update containerd binary to v1.4.4
update containerd binary to v1.4.4

full diff: https://github.com/containerd/containerd/compare/v1.4.3...v1.4.4

Release notes:

The fourth patch release for `containerd` 1.4 contains a fix for CVE-2021-21334
along with various other minor issues.
See [GHSA-36xw-fx78-c5r4](https://github.com/containerd/containerd/security/advisories/GHSA-36xw-fx78-c5r4)
for more details related to CVE-2021-21334.

Notable Updates

- Fix container create in CRI to prevent possible environment variable leak between containers
- Update shim server to return grpc NotFound error
- Add bounds on max `oom_score_adj` value for shim's AdjustOOMScore
- Update task manager to use fresh context when calling shim shutdown
- Update Docker resolver to avoid possible concurrent map access panic
- Update shim's log file open flags to avoid containerd hang on syscall open
- Fix incorrect usage calculation

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

trebonian/docker,AkihiroSuda/docker,Ramzec/docker,jimjag/docker,bearstech/moby,jimjag/docker,Ramzec/docker,Mokolea/docker,paralin/docker,Mokolea/docker,jthelin/docker,thaJeztah/docker,AkihiroSuda/docker,yosifkit/docker,yosifkit/docker,yosifkit/docker,moby/moby,bearstech/moby,konstruktoid/docker-upstream,cpuguy83/docker,Ramzec/docker,trebonian/docker,gnailuy/docker,bearstech/moby,moby/moby,thaJeztah/docker,Ramzec/docker,jameszhan/docker,gnailuy/docker,Mokolea/docker,trebonian/docker,Mokolea/docker,cpuguy83/docker,nalind/docker,kojiromike/docker,moby/moby,nalind/docker,thaJeztah/docker,mahak/docker,nawawi/docker,mahak/docker,cpuguy83/docker,vdemeester/docker,konstruktoid/docker-upstream,AkihiroSuda/docker,moul/docker,nawawi/docker,djs55/docker,jameszhan/docker,djs55/docker,flavio/docker,kojiromike/docker,yosifkit/docker,paralin/docker,nawawi/docker,mahak/docker,paralin/docker,moul/docker,jimjag/docker,thaJeztah/docker,flavio/docker,nalind/docker,konstruktoid/docker-upstream,gnailuy/docker,moby/moby,nalind/docker,flavio/docker,moul/docker,docker/docker,docker/docker,nawawi/docker,bearstech/moby,konstruktoid/docker-upstream,cpuguy83/docker,djs55/docker,kojiromike/docker,jameszhan/docker,flavio/docker,docker/docker,AkihiroSuda/docker,vdemeester/docker,vdemeester/docker,jthelin/docker,gnailuy/docker,mahak/docker,jimjag/docker,paralin/docker,moul/docker,trebonian/docker