Compatibility with logrotate in /usr/bin

[lukasgr90]

How to categorize this PR?

/area os /kind bug

What this PR does / why we need it:

Recent flatcar images has the logrotate binary not in /usr/sbin anymore, but in /usr/bin. Thus this PR extends the run-command.service (doing Containerd & Flatcar / Core OS related patches) to check for the alternate location of logrotate. If it finds the binary under /usr/bin it patches the path in /etc/systemd/system/containerd-logrotate.service.

Which issue(s) this PR fixes: Fixes #54

Special notes for your reviewer: -

Release note:

bugfix user 
fixes containerd-lograte unit for Flatcar images with logrotate in /usr/bin

[gardener-robot]

@lukasgr90 Thank you for your contribution.

[gardener-robot-ci-2]

Thank you @lukasgr90 for your contribution. Before I can start building your PR, a member of the organization must set the required label(s) {'reviewed/ok-to-test'}. Once started, you can check the build status in the PR checks section below.

[MrBatschner]

/add reviewed/ok-to-test

[BeckerMax]

/ping @MrBatschner @danielfoehrKn

[gardener-robot]

@mrbatschner, @danielfoehrkn ℹ️ please take some time to help BeckerMax or redirect to someone else if you can't.