Switch from k8s utils/mount to moby/sys mount

[mrajashree]

CAdvisor is vendored into kubernetes/kubernetes, so it cannot use staging
repositories as dependencies. The k8s.io/utils/mount is a staging repository.
This commit switches cAdvisor to use moby/sys/mountinfo instead of k8s.io/utils/mount to avoid
dependency issues.

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[k8s-ci-robot]

Hi @mrajashree. Thanks for your PR.

I'm waiting for a google member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[google-cla]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[mrajashree]

@googlebot I signed it!

[dims]

Looks like a very straight forward rip and replace :)

thanks @mrajashree

[dims]

ouch TestDockerFilesystemStats failure

[mrajashree]

/test pull-cadvisor-e2e

[k8s-ci-robot]

@mrajashree: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/test pull-cadvisor-e2e

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[dims]

/ok-to-test

[mrajashree]

@dims tests are all clear now 👍

[bobbypage]

Looks great, thanks for doing this! LGTM

/cc @brahmaroutu

[brahmaroutu]

Awesome, thanks for the effort, @mrajashree @dims @bobbypage for taking this on. I can now proceed to update the k8s vendoring to remove utils/mount once the cAdvisor version is updated.