fix: pitr validation inline with other ICD validation

[shemau]

Description

Bring PITR validation in line with other ICD modules.

Release required?

• No release
• Patch release (x.x.X)
• Minor release (x.X.x)
• Major release (X.x.x)

Release notes content

Internal improvements to catch misconfiguration earlier and provide more meaningful error messages.

Run the pipeline

If the CI pipeline doesn't run when you create the PR, the PR requires a user with GitHub collaborators access to run the pipeline.

Run the CI pipeline when the PR is ready for review and you expect tests to pass. Add a comment to the PR with the following text:

/run pipeline

Checklist for reviewers

• If relevant, a test for the change is included or updated with this PR.
• If relevant, documentation for the change is included or updated with this PR.

For mergers

• Use a conventional commit message to set the release level. Follow the guidelines.
• Include information that users need to know about the PR in the commit message. The commit message becomes part of the GitHub release notes.
• Use the Squash and merge option.

[shemau]

/run pipeline

[shemau]

/run pipeline

[shemau]

/run pipeline

[terraform-ibm-modules-ops]

🎉 This PR is included in version 1.11.7 🎉

The release is available on:

• GitHub release
• v1.11.7

Your semantic-release bot 📦🚀