Upgrade github.com/prometheus/client_golang to help unblock dependabot.

[jkh52]

Help unblock dependabot and enable the 0.31 release.

$ go get github.com/prometheus/[email protected]
$ go mod tidy
$ go mod vendor

Fix test fallout.

[k8s-ci-robot]

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This pull-request has been approved by: jkh52

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[jkh52]

/assign @cheftako

[cheftako]

/test pull-apiserver-network-proxy-make-lint-master

[cheftako]

Rerunning lint to see if the new kubekins image has helped with the lint error.

[cheftako]

/test pull-apiserver-network-proxy-make-lint-master

[k8s-ci-robot]

@jkh52: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-apiserver-network-proxy-make-lint-master	7b3f04c	link	true	/test pull-apiserver-network-proxy-make-lint-master

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[bwplotka]

FYI: We reverted the problematic change in https://github.com/prometheus/client_golang/releases/tag/v1.20.5, sorry for pain!

[jkh52]

FYI: We reverted the problematic change in https://github.com/prometheus/client_golang/releases/tag/v1.20.5, sorry for pain!

Thanks for the heads up! I verified that v1.20.5 resolves our dependabot issue. I will close this workaround PR.