[WIP] certrotationcontroller: make signers and caBunldes thread safe

[p0lyn0mial]

a proof for openshift/library-go#1753

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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[openshift-ci]

@p0lyn0mial: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-gcp-operator-single-node	20f6d16	link	false	/test e2e-gcp-operator-single-node
ci/prow/e2e-aws-ovn-single-node	20f6d16	link	false	/test e2e-aws-ovn-single-node
ci/prow/e2e-aws-operator-disruptive-single-node	20f6d16	link	false	/test e2e-aws-operator-disruptive-single-node
ci/prow/verify-deps	20f6d16	link	true	/test verify-deps

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[p0lyn0mial]

/close

[openshift-ci]

@p0lyn0mial: Closed this PR.

In response to this:

/close

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