feat: Add UI regex validation

[arya-girish-k]

Description

Add UI regex valiadation in ibm_catalog.json.

Release required?

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

Release notes content

This PR enables input validation in the UI for several string variables by leveraging the value_constraints array defined in the catalog. These constraints will be used by the UI to validate user input at runtime. The changed variables include:
prefix,existing_secrets_manager_instance_crn,existing_kms_instance_crn,existing_kms_key_crn,backup_crn,existing_backup_kms_key_crn,existing_postgresql_instance_crn,remote_leader_crn

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.

[arya-girish-k]

/run pipeline