feat: add UI Regex Validation

[arya-girish-k]

Description

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

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[arya-girish-k]

/run pipeline

[arya-girish-k]

Testing ss from UI:

[arya-girish-k]

/run pipeline

[Aashiq-J]

There are other inputs as well which can have the regex validation
audit_webhook_listener_image_tag_digest , existing_secrets_manager_instance_crn , secrets_manager_secret_group_id

[arya-girish-k]

• Regarding audit_webhook_listener_image_tag_digest as per the discussion adding validation here is not recommended.The user may wish to use their won image and they may wish to use an image tag instead of digest, yet the regex is only allowing digest.

• existing_secrets_manager_instance_crn ,secrets_manager_secret_group_id Terraform validation are not present ,Do I need to add the validation?

CC: @Aashiq-J