feat: add support for feature gates

[eggfoobar]

added the ability to add a comma seperated list of feature gates to be ingested and parsed into the install-config.yaml

[openshift-ci]

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[openshift-ci]

@eggfoobar: 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-agent-4control-ipv4	2c95720	link	false	/test e2e-agent-4control-ipv4
ci/prow/e2e-metal-ipi-serial-ovn-ipv6	2c95720	link	false	/test e2e-metal-ipi-serial-ovn-ipv6
ci/prow/e2e-metal-ipi-virtualmedia	2c95720	link	false	/test e2e-metal-ipi-virtualmedia
ci/prow/e2e-metal-ovn-arbiter	2c95720	link	false	/test e2e-metal-ovn-arbiter
ci/prow/e2e-agent-5control-ipv4	2c95720	link	false	/test e2e-agent-5control-ipv4
ci/prow/e2e-metal-ipi-ovn-dualstack	2c95720	link	false	/test e2e-metal-ipi-ovn-dualstack
ci/prow/e2e-agent-sno-ipv6	2c95720	link	false	/test e2e-agent-sno-ipv6
ci/prow/e2e-agent-bad-dns	2c95720	link	false	/test e2e-agent-bad-dns
ci/prow/e2e-agent-ha-dualstack	2c95720	link	false	/test e2e-agent-ha-dualstack
ci/prow/e2e-metal-ipi-bm-bond	2c95720	link	false	/test e2e-metal-ipi-bm-bond
ci/prow/e2e-agent-compact-ipv4-iso-no-registry	2c95720	link	false	/test e2e-agent-compact-ipv4-iso-no-registry

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[eggfoobar]

/retest-required

[jaypoulz]

/lgtm
Thanks for putting this together!

[openshift-ci]

@jaypoulz: changing LGTM is restricted to collaborators

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In response to this:

/lgtm
Thanks for putting this together!

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[eggfoobar]

/retest-required

[eggfoobar]

/retest-required