[WIP] mount-utils: Support structured and contextual logging

[soma00333]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Implement support for structured logging and contextual logging in mount-utils.
https://github.com/kubernetes/community/blob/master/contributors/devel/sig-instrumentation/migration-to-structured-logging.md

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

I'll confirm that they pass the logcheck tests:

$ GOOS=linux _output/local/bin/golangci-lint run --color=always --config=hack/golangci.yaml ./...

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

NONE

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[k8s-ci-robot]

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: soma00333
Once this PR has been reviewed and has the lgtm label, please assign jsafrane for approval. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• staging/src/k8s.io/mount-utils/OWNERS

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