Update create_url updateMask for google_chronicle_rule_deployment res… (GoogleCloudPlatform#13053)

Author: ankitgoyal0301

mmv1/products/chronicle/RuleDeployment.yaml

@@ -21,7 +21,7 @@ references:
   api: 'https://cloud.google.com/chronicle/docs/reference/rest/v1alpha/RuleDeployment'
 base_url: projects/{{project}}/locations/{{location}}/instances/{{instance}}/rules/{{rules}}/deployments
 self_link: projects/{{project}}/locations/{{location}}/instances/{{instance}}/rules/{{rule}}/deployment
-create_url: projects/{{project}}/locations/{{location}}/instances/{{instance}}/rules/{{rule}}/deployment?updateMask=enabled,alerting,archived,runFrequency
+create_url: projects/{{project}}/locations/{{location}}/instances/{{instance}}/rules/{{rule}}/deployment
 id_format: projects/{{project}}/locations/{{location}}/instances/{{instance}}/rules/{{rule}}/deployment
 import_format:
   - projects/{{project}}/locations/{{location}}/instances/{{instance}}/rules/{{rule}}/deployment
@@ -31,6 +31,9 @@ update_mask: true
 exclude_delete: true
 autogen_status: UnVsZURlcGxveW1lbnQ=
 
+custom_code:
+  pre_create: 'templates/terraform/pre_create/chronicle_rule_deployment.go.tmpl'
+
 examples:
   - name: 'chronicle_ruledeployment_basic'
     primary_resource_id: 'example'

mmv1/templates/terraform/pre_create/chronicle_rule_deployment.go.tmpl

@@ -0,0 +1,17 @@
+// Read the config and update the mask only if set by the user in terraform code
+
+params := []string{"enabled", "alerting", "archived", "run_frequency"}
+var existingParams []string
+
+// Populating existingParams with the params that exist
+for _, param := range params {
+    if _, ok := d.GetOk(param); ok {
+        existingParams = append(existingParams, param)
+    }
+}
+
+// Updating the url to have updateMask
+url, err = transport_tpg.AddQueryParams(url, map[string]string{"updateMask": strings.Join(existingParams, ",")})
+if err != nil {
+    return err
+}