OCM-11521 | fix: validate custom machinepool disk size

[willkutler]

What this PR does / why we need it:
Adds validation for custom disk size for both day 1 & 2 classic and HCP machine pools created with TF. Previously these fields were not validated in the provider, so failures would only happen on the API side.

Which issue(s) this PR fixes (optional, use fixes #<issue_number>(, fixes #<issue_number>, ...) format, where issue_number might be a GitHub issue, or a Jira story (OCM-xxxx):
Fixes #OCM-11521

Change type

• New feature
• [x ] Bug fix
• Build
• CI
• Documentation
• Performance
• Refactor
• Style
• Unit tests
• [x ] Subsystem tests

Checklist

• [ x] Subject and description added to both, commit and PR.
• [ x] Relevant issues have been referenced.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

Hi @willkutler. Thanks for your PR.

I'm waiting for a terraform-redhat 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[marcolan018]

lgtm

[willkutler]

/ok-to-test

[openshift-ci]

@willkutler: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/ok-to-test

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.

[robpblake]

/ok-to-test

[willkutler]

/retest

[gdbranco]

/retest

[gdbranco]

/retest

[gdbranco]

/retest

[gdbranco]

/retest

[gdbranco]

/retest

[gdbranco]

/retest

[openshift-ci]

@willkutler: 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
ci/prow/rosa-hcp-advanced-critical-high-presubmit	ca26262	link	true	/test rosa-hcp-advanced-critical-high-presubmit

Full PR test history. Your PR dashboard.

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. I understand the commands that are listed here.

[gdbranco]

Failure unrelated to the validation added, cluster provision is being slow. Merging