aws/cert-manager: Tighten IAM permissions for cert-manager

[andsens]

This change restricts which record types and domain prefixes cert-manager is allowed to change for DNS01 acme challenges.

Only _acme-challenge.* TXT records may be created/updated/removed.

Implements #15680

I ran make all examples test and it compiles, but beyond that I have not created any tests for this (knowledge of go is ankle deep) so I hope someone is kind enough to help me out and add that :-)

[linux-foundation-easycla]

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• ✅ login: andsens / name: Anders Ingemann (a902f9e)

[k8s-ci-robot]

Hi @andsens. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[hakman]

/ok-to-test

[hakman]

Thank you @andsens!
/lgtm
/approve

[k8s-ci-robot]

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