dev-release: Document that plugins should also be tagged
dev-release: Document that plugins should also be tagged

Add commands for creating and pushing tags on the plugins.

Also remove the distinction between pushing final release and RC
release tags. This distinction is not made in the section about
creating the tags.

Change-Id: I4dcdc6ac81b2838b4fa9153efcecff87f3b07e3c

supriyantomaftuh/gerrit,TonyChai24/test,Distrotech/gerrit,WANdisco/gerrit,netroby/gerrit,WANdisco/gerrit,renchaorevee/gerrit,quyixia/gerrit,Seinlin/gerrit,thesamet/gerrit,WANdisco/gerrit,hdost/gerrit,anminhsu/gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,gerrit-review/gerrit,qtproject/qtqa-gerrit,pkdevbox/gerrit,renchaorevee/gerrit,TonyChai24/test,netroby/gerrit,joshuawilson/merrit,renchaorevee/gerrit,Distrotech/gerrit,supriyantomaftuh/gerrit,Distrotech/gerrit,gcoders/gerrit,TonyChai24/test,gerrit-review/gerrit,quyixia/gerrit,anminhsu/gerrit,gcoders/gerrit,thinkernel/gerrit,GerritCodeReview/gerrit,hdost/gerrit,pkdevbox/gerrit,TonyChai24/test,anminhsu/gerrit,quyixia/gerrit,thesamet/gerrit,gcoders/gerrit,joshuawilson/merrit,joshuawilson/merrit,Seinlin/gerrit,renchaorevee/gerrit,pkdevbox/gerrit,supriyantomaftuh/gerrit,anminhsu/gerrit,dwhipstock/gerrit,Seinlin/gerrit,thinkernel/gerrit,TonyChai24/test,MerritCR/merrit,MerritCR/merrit,MerritCR/merrit,dwhipstock/gerrit,TonyChai24/test,jackminicloud/test,jackminicloud/test,netroby/gerrit,netroby/gerrit,jackminicloud/test,dwhipstock/gerrit,MerritCR/merrit,quyixia/gerrit,GerritCodeReview/gerrit,Seinlin/gerrit,GerritCodeReview/gerrit,supriyantomaftuh/gerrit,anminhsu/gerrit,Distrotech/gerrit,thesamet/gerrit,jackminicloud/test,quyixia/gerrit,supriyantomaftuh/gerrit,gerrit-review/gerrit,joshuawilson/merrit,Distrotech/gerrit,renchaorevee/gerrit,jackminicloud/test,thesamet/gerrit,MerritCR/merrit,Seinlin/gerrit,qtproject/qtqa-gerrit,TonyChai24/test,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,thesamet/gerrit,anminhsu/gerrit,thinkernel/gerrit,quyixia/gerrit,pkdevbox/gerrit,Distrotech/gerrit,anminhsu/gerrit,gcoders/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,gerrit-review/gerrit,dwhipstock/gerrit,GerritCodeReview/gerrit,hdost/gerrit,dwhipstock/gerrit,gcoders/gerrit,Seinlin/gerrit,Seinlin/gerrit,thinkernel/gerrit,netroby/gerrit,MerritCR/merrit,dwhipstock/gerrit,GerritCodeReview/gerrit,joshuawilson/merrit,joshuawilson/merrit,dwhipstock/gerrit,supriyantomaftuh/gerrit,renchaorevee/gerrit,pkdevbox/gerrit,MerritCR/merrit,pkdevbox/gerrit,pkdevbox/gerrit,gcoders/gerrit,gerrit-review/gerrit,quyixia/gerrit,thesamet/gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,gcoders/gerrit,hdost/gerrit,netroby/gerrit,hdost/gerrit,jackminicloud/test,Distrotech/gerrit,thesamet/gerrit,joshuawilson/merrit,hdost/gerrit,thinkernel/gerrit,renchaorevee/gerrit,jackminicloud/test,gerrit-review/gerrit,thinkernel/gerrit,WANdisco/gerrit,MerritCR/merrit,joshuawilson/merrit,supriyantomaftuh/gerrit,hdost/gerrit,gerrit-review/gerrit,thinkernel/gerrit,netroby/gerrit