Upgrade csi-lib-utils to 0.7.1

[Jiawei0227]

What type of PR is this?

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/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:
This PR upgrade csi-lib-utils to 0.7.1

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Include `process_start_time_seconds` metric to the endpoint to fix the metric parsing issue.

[k8s-ci-robot]

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[Jiawei0227]

/cc @msau42

[k8s-ci-robot]

@Jiawei0227: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-kubernetes-csi-external-snapshotter-1-19-on-kubernetes-1-19	30beacb	link	/test pull-kubernetes-csi-external-snapshotter-1-19-on-kubernetes-1-19

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[Jiawei0227]

closed as this is automatically included by #392