Fixed ServiceAttachment target_service region/location inconsistency when referencing a Secure Web Proxy on creation (#13862) (#10178)

[upstream:27a690c5917b79021fe0eabc8c46ef2e610b7ebb]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/13862.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+compute: fixed validation for `target_service` field in `google_compute_service_attachment` resource causing issues when targeting a `google_network_services_gateway` resource
+```

google-beta/tpgresource/field_helpers.go

@@ -33,6 +33,8 @@ const (
 	RegionalLinkTemplate           = "projects/%s/regions/%s/%s/%s"
 	RegionalLinkBasePattern        = "projects/(.+)/regions/(.+)/%s/(.+)"
 	RegionalPartialLinkBasePattern = "regions/(.+)/%s/(.+)"
+	LocalLinkBasePattern           = "projects/(.+)/locations/(.+)/%s/(.+)"
+	LocalPartialLinkBasePattern    = "locations/(.+)/%s/(.+)"
 	ProjectLinkTemplate            = "projects/%s/%s/%s"
 	ProjectBasePattern             = "projects/(.+)/%s/(.+)"
 	OrganizationLinkTemplate       = "organizations/%s/%s/%s"
@@ -430,6 +432,16 @@ func ParseRegionalFieldValue(resourceType, fieldValue, projectSchemaField, regio
 		}, nil
 	}
 
+	r = regexp.MustCompile(fmt.Sprintf(LocalLinkBasePattern, resourceType))
+	if parts := r.FindStringSubmatch(fieldValue); parts != nil {
+		return &RegionalFieldValue{
+			Project:      parts[1],
+			Region:       parts[2],
+			Name:         parts[3],
+			resourceType: resourceType,
+		}, nil
+	}
+
 	project, err := GetProjectFromSchema(projectSchemaField, d, config)
 	if err != nil {
 		return nil, err
@@ -445,6 +457,16 @@ func ParseRegionalFieldValue(resourceType, fieldValue, projectSchemaField, regio
 		}, nil
 	}
 
+	r = regexp.MustCompile(fmt.Sprintf(LocalPartialLinkBasePattern, resourceType))
+	if parts := r.FindStringSubmatch(fieldValue); parts != nil {
+		return &RegionalFieldValue{
+			Project:      project,
+			Region:       parts[1],
+			Name:         parts[2],
+			resourceType: resourceType,
+		}, nil
+	}
+
 	region, err := GetRegionFromSchema(regionSchemaField, zoneSchemaField, d, config)
 	if err != nil {
 		return nil, err