Restore active mount counts on live-restore

[cpuguy83]

When live-restoring a container the volume driver needs be notified that there is an active mount for the volume.
Before this change the count is zero until the container stops and the uint64 overflows pretty much making it so the volume can never be removed until another daemon restart.

Fixes #44422

[thaJeztah]

LGTM

[thaJeztah]

docker-py failure can be ignored and is unrelated (fixed on master)

[thaJeztah]

@corhere @neersighted @vvoland PTAL

[vvoland]

Overall LGTM, the logs need to be adjusted now though

[neersighted]

One logging nit, otherwise LGTM.

[thaJeztah]

Looks like we should add a -f in the github actions as well;

sudo rm /etc/docker/daemon.json
  sudo service docker restart
  docker version
  docker info
  shell: /usr/bin/bash -e {0}
  env:
    DESTDIR: ./build
    BUILDKIT_REPO: moby/buildkit
    BUILDKIT_TEST_DISABLE_FEATURES: cache_backend_azblob,cache_backend_s3,merge_diff
    BUILDKIT_REF: 798ad6b0ce9f2fe86dfb2b0277e6770d0b545871
rm: cannot remove '/etc/docker/daemon.json': No such file or directory
Error: Process completed with exit code 1.

[solidgoldbomb]

Thanks for all of your work on this issue + fix @cpuguy83.

[cpuguy83]

Sorry it took so long to recognize where the issue was!