docs: update Helm values for IRSA

[cnemo-cenic]

What type of PR is this?

/kind documentation

What is this PR about? / Why do we need it?

Both the controller and node service accounts need to have the referenced annotation set. Adding explicit placeholders rather than mock account ID which could more easily be copy-pasted unwittingly.

How was this change tested?

N/A - docs

Does this PR introduce a user-facing change?

N/A - docs

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[cnemo-cenic]

Hopefully a trivial docs-only change does not require CLA signing, as that may be a blocker here.

FWIW, the yaml snippet was lifted verbatim from the values.yaml in this repo.

[AndrewSirenko]

Hey @cnemo-cenic, thanks for your contribution! Unfortunately even documentation PRs need the contributor to sign CLA.

Would you want us to open an identical PR on your behalf instead? Let us know!

[AndrewSirenko]

The node SA does not need the role-arn annoation.

This is because our node DaemonSet pods use that ebs-csi IAM Role because no AWS EC2 API calls are made from ebs-csi-node pods.

Therefore lets delete this part.