add regex validation

Author: iamar7

ibm_catalog.json

@@ -66,7 +66,14 @@
             },
             {
               "key": "prefix",
-              "required": true
+              "required": true,
+              "value_constraints": [
+                {
+                  "type": "regex",
+                  "description": "Prefix must begin with a lowercase letter and may contain only lowercase letters, digits, and hyphens '-'. It must not end with a hyphen('-'), and cannot contain consecutive hyphens ('--'). It should not exceed 16 characters",
+                  "value": "^$|^__NULL__$|^[a-z](?!.*--)(?:[a-z0-9-]{0,14}[a-z0-9])?$"
+                }
+              ]
             },
             {
               "key": "region",
@@ -270,10 +277,24 @@
               "key": "ibmcloud_kms_api_key"
             },
             {
-              "key": "existing_kms_instance_crn"
+              "key": "existing_kms_instance_crn",
+              "value_constraints": [
+                {
+                  "type": "regex",
+                  "description": "The value provided for 'existing_kms_instance_crn' is not valid.",
+                  "value": "^__NULL__$|^crn:(.*:){3}(kms|hs-crypto):(.*:){2}[0-9a-fA-F]{8}(?:-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}::$"
+                }
+              ]
             },
             {
-              "key": "existing_kms_key_crn"
+              "key": "existing_kms_key_crn",
+              "value_constraints": [
+                {
+                  "type": "regex",
+                  "description": "The value provided for 'existing_kms_key_crn' in not valid.",
+                  "value": "^__NULL__$|^crn:(.*:){3}(kms|hs-crypto):(.*:){2}[0-9a-fA-F]{8}(?:-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}:key:[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$"
+                }
+              ]
             },
             {
               "key": "kms_endpoint_type",
@@ -305,7 +326,14 @@
               "key": "skip_app_config_event_notifications_auth_policy"
             },
             {
-              "key": "existing_event_notifications_instance_crn"
+              "key": "existing_event_notifications_instance_crn",
+              "value_constraints": [
+                {
+                  "type": "regex",
+                  "description": "The value provided for 'existing_event_notifications_instance_crn' in not valid.",
+                  "value": "^__NULL__$|^crn:(.*:){3}event-notifications:(.*:){2}[0-9a-fA-F]{8}(?:-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}::$"
+                }
+              ]
             },
             {
               "key": "event_notifications_endpoint_url"