feat: added regex validation to DA inputs

[iamar7]

Description

Issue: https://github.ibm.com/GoldenEye/issues/issues/15220

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[iamar7]

/run pipeline

[iamar7]

/run pipeline

[iamar7]

• prefix

• existing_monitoring_crn

[iamar7]

/run pipeline

[iamar7]

/run pipeline

[iamar7]

/run pipeline

[terraform-ibm-modules-ops]

🎉 This PR is included in version 1.8.0 🎉

The release is available on:

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• v1.8.0

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