Use native call for listing plugins in bash completion
Use native call for listing plugins in bash completion

`docker plugin ls` now has `--format`, so there is no more need for
postprocessing raw `docker plugin ls` output with `awk` any more.
This will make generation of plugin lists robust against changes
in `docker plugin ls` output.

Signed-off-by: Harald Albers <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@albersweb.de>

raja-sami-10p/moby,rhatdan/docker,yongtang/docker,jvanz/docker,alfred-landrum/docker,KarthikNayak/docker,mstanleyjones/docker,Ramzec/docker,akira-baruah/docker,dmcgowan/docker,crosbymichael/docker,haveatry/docker,yongtang/docker,allencloud/docker,darrenstahlmsft/moby,bonczj/moby-json-file-logger,mkumatag/docker,tonistiigi/docker,diogomonica/docker,jlhawn/docker,laijs/docker,flavio/docker,dgageot/docker,madhanrm/docker,gjaskiewicz/moby,scotttlin/docker,cpuguy83/docker,qudongfang/docker,rremer/moby,shhsu/docker,mike1729/docker,shishir-a412ed/docker,dims/docker,trebonian/docker,dperny/docker,moypray/docker,HideoYamauchi/docker,yosifkit/docker,moul/docker,danyalKhaliq10p/moby,nalind/docker,thtanaka/docker,moby/moby,pradipd/moby,laijs/moby,srust/docker,konstruktoid/docker-upstream,djs55/docker,catinthesky/docker,prertik/docker,sterchelen/docker,mstanleyjones/docker,liaoqingwei/docker,Ramzec/docker,vdemeester/docker,cyphar/docker,miminar/docker,mahak/docker,Syntaxide/docker,laijs/moby,mtesselH/docker,yosifkit/docker,maxamillion/docker,rremer/moby,HideoYamauchi/docker,rancher/docker,sdurrheimer/docker,YuPengZTE/docker,yasiramin10p/moby,Syntaxide/docker,dperny/docker,gjaskiewicz/moby,erikstmartin/docker,darrenstahlmsft/docker,KingEmet/docker,jvanz/docker,tklauser/docker,raja-sami-10p/moby,sarnautov/moby,ibuildthecloud/docker,jimjag/docker,kolyshkin/moby,paralin/docker,dsheets/moby,gnailuy/docker,xuxinkun/docker,sarnautov/moby,Mokolea/docker,cyphar/docker,ibuildthecloud/docker,thaJeztah/docker,duglin/docker,coreos/docker,YuPengZTE/docker,catinthesky/docker,raja-sami-10p/moby,mkumatag/docker,sterchelen/docker,qudongfang/docker,rhatdan/docker,ffoysal/docker,YuPengZTE/docker,jvanz/docker,diogomonica/docker,unclejack/docker,maxamillion/docker,tklauser/docker,laijs/docker,kencochrane/docker,moul/docker,dccurtis/docker,crosbymichael/docker,jameszhan/docker,tklauser/docker,dsheets/moby,unclejack/docker,tophj-ibm/moby,Mokolea/docker,resin-io/docker,lixiaobing1/docker,POLJM242/docker,justincormack/docker,hqhq/moby,justincormack/docker,coolljt0725/docker,duglin/docker,bearstech/moby,yasiramin10p/moby,amatsus/docker,AkihiroSuda/docker,xuxinkun/docker,AkihiroSuda/docker,shishir-a412ed/docker,yummypeng/docker,johnstep/moby-moby,paralin/docker,POLJM242/docker,jimjag/docker,lixiaobing1/docker,thaJeztah/docker,mike1729/docker,tophj-ibm/moby,docker/docker,JMesser81/docker,moby/moby,mkumatag/docker,liaoqingwei/docker,gnailuy/docker,mixja/docker,nawawi/docker,shhsu/docker,erikstmartin/docker,haveatry/docker,tmp6154/docker,bearstech/moby,kolyshkin/moby,JMesser81/docker,scotttlin/docker,shishir-a412ed/docker,allencloud/docker,coolljt0725/docker,srust/docker,kencochrane/docker,resin-io/docker,darrenstahlmsft/moby,pramodhkp/moby,alfred-landrum/docker,AkihiroSuda/docker,gschaetz/moby,amatsus/docker,madhanrm/docker,PatrickLang/moby,jameszhan/docker,jlhawn/docker,thtanaka/docker,erikh/docker,q384566678/docker,darrenstahlmsft/moby,pradipd/moby,gschaetz/moby,yosifkit/docker,lixiaobing10051267/docker,gnailuy/docker,tonistiigi/docker,akira-baruah/docker,gschaetz/moby,SvenDowideit/docker,vdemeester/docker,sdurrheimer/docker,djs55/docker,jthelin/docker,konstruktoid/docker-upstream,tianon/docker,moypray/docker,flavio/docker,rhatdan/docker,rancher/docker,ndeloof/docker,KarthikNayak/docker,mahak/docker,nawawi/docker,AkihiroSuda/docker,tophj-ibm/docker,mahak/docker,jimjag/docker,ripcurld0/moby,flavio/docker,crosbymichael/docker,estesp/docker,kolyshkin/moby,ffoysal/docker,sterchelen/docker,tmp6154/docker,coreos/docker,fcrisciani/docker,cyphar/docker,trebonian/docker,dccurtis/docker,paralin/docker,madhanrm/docker,bonczj/moby-json-file-logger,lixiaobing10051267/docker,sarnautov/moby,estesp/docker,qudongfang/docker,moby/moby,unclejack/docker,naveed-jamil-tenpearls/moby,erikh/docker,jwhonce/docker,whuwxl/docker,konstruktoid/docker-upstream,flavio/docker,shhsu/docker,konstruktoid/docker-1,prertik/docker,mtesselH/docker,kolyshkin/docker,Ramzec/docker,pramodhkp/moby,catinthesky/docker,johnstep/moby-moby,noironetworks/docker,thaJeztah/docker,resin-io/docker,Mokolea/docker,danyalKhaliq10p/moby,pradipd/moby,ibuildthecloud/docker,noironetworks/docker,dsheets/moby,coreos/docker,dgageot/docker,michael-holzheu/docker,kolyshkin/docker,coolljt0725/docker,diogomonica/docker,bonczj/moby-json-file-logger,charleszheng44/moby,justincormack/docker,fcrisciani/docker,tophj-ibm/moby,pramodhkp/moby,mikebrow/docker,nalind/docker,whuwxl/docker,ffoysal/docker,imkin/moby,yummypeng/docker,darrenstahlmsft/docker,PatrickLang/moby,yummypeng/docker,moby/moby,bearstech/moby,hqhq/moby,Mokolea/docker,imkin/moby,dgageot/docker,gnailuy/docker,yosifkit/docker,Syntaxide/docker,ripcurld0/moby,charleszheng44/moby,imkin/moby,whuwxl/docker,q384566678/docker,SvenDowideit/docker,dims/docker,michael-holzheu/docker,thtanaka/docker,alfred-landrum/docker,paralin/docker,jlhawn/docker,naveed-jamil-tenpearls/moby,naveed-jamil-tenpearls/moby,trebonian/docker,x1022as/docker,tophj-ibm/docker,miminar/docker,ndeloof/docker,tianon/docker,JMesser81/docker,lixiaobing1/docker,hqhq/moby,jwhonce/docker,kojiromike/docker,moypray/docker,SvenDowideit/docker,lixiaobing10051267/docker,mikebrow/docker,erikh/docker,michael-holzheu/docker,xuxinkun/docker,darrenstahlmsft/docker,dmcgowan/docker,mstanleyjones/docker,ndeloof/docker,mixja/docker,dims/docker,erikstmartin/docker,konstruktoid/docker-upstream,srust/docker,laijs/docker,ColinHebert/docker,vdemeester/docker,laijs/moby,rremer/moby,Ramzec/docker,q384566678/docker,dmcgowan/docker,konstruktoid/docker-1,ripcurld0/moby,noironetworks/docker,cpuguy83/docker,trebonian/docker,kencochrane/docker,mahak/docker,prertik/docker,maxamillion/docker,allencloud/docker,dperny/docker,moul/docker,x1022as/docker,gjaskiewicz/moby,thaJeztah/docker,moul/docker,cpuguy83/docker,konstruktoid/docker-1,djs55/docker,liaoqingwei/docker,mtesselH/docker,scotttlin/docker,nawawi/docker,danyalKhaliq10p/moby,jameszhan/docker,johnstep/moby-moby,KarthikNayak/docker,nalind/docker,kojiromike/docker,jimjag/docker,duglin/docker,bearstech/moby,docker/docker,HideoYamauchi/docker,ColinHebert/docker,fcrisciani/docker,ibuildthecloud/docker,kojiromike/docker,tonistiigi/docker,x1022as/docker,cpuguy83/docker,KingEmet/docker,miminar/docker,nawawi/docker,estesp/docker,jthelin/docker,yasiramin10p/moby,mikebrow/docker,KingEmet/docker,sdurrheimer/docker,jwhonce/docker,tophj-ibm/docker,charleszheng44/moby,yongtang/docker,tmp6154/docker,rancher/docker,docker/docker,ColinHebert/docker,amatsus/docker,haveatry/docker,ibuildthecloud/docker,mike1729/docker,PatrickLang/moby,dccurtis/docker,nalind/docker,mixja/docker