feat: use new restricted liveness probe endpoint

[anothertobi]

What type of PR is this?

/kind feature

What this PR does / why we need it:

The --health-port option is deprecated and --http-endpoint the new
option to use. Since --http-endpoint additionally exposes metrics, the
liveness probe is limited to only listen on localhost by default. With
this only processes on the host network, like kubelet, can call the
endpoint. Regular pods can no longer access the liveness probe via the
node IP address.

Which issue(s) this PR fixes:

n/a

Special notes for your reviewer:

n/a

Does this PR introduce a user-facing change?:

Updated the liveness probe endpoints to only listen on localhost by default.

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[k8s-ci-robot]

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[andyzhangx]

/ok-to-test

[andyzhangx]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, anothertobi

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[coveralls]

Pull Request Test Coverage Report for Build 8467124548

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 78.915%

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Totals
Change from base Build 8435882188:	0.0%
Covered Lines:	887
Relevant Lines:	1124

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💛 - Coveralls