Move customResponseHeaders to beta only (#4286) (#2763)

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

Author: modular-magician

.changelog/4286.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+compute: removed `custom_response_headers` from GA `google_compute_backend_service` since it only works in the Beta version
+```

google-beta/resource_compute_backend_service_generated_test.go

@@ -231,7 +231,7 @@ func TestAccComputeBackendService_backendServiceNetworkEndpointExample(t *testin
 
 	vcrTest(t, resource.TestCase{
 		PreCheck:  func() { testAccPreCheck(t) },
-		Providers: testAccProviders,
+		Providers: testAccProvidersOiCS,
 		ExternalProviders: map[string]resource.ExternalProvider{
 			"random": {},
 		},
@@ -240,30 +240,28 @@ func TestAccComputeBackendService_backendServiceNetworkEndpointExample(t *testin
 			{
 				Config: testAccComputeBackendService_backendServiceNetworkEndpointExample(context),
 			},
-			{
-				ResourceName:      "google_compute_backend_service.default",
-				ImportState:       true,
-				ImportStateVerify: true,
-			},
 		},
 	})
 }
 
 func testAccComputeBackendService_backendServiceNetworkEndpointExample(context map[string]interface{}) string {
 	return Nprintf(`
 resource "google_compute_global_network_endpoint_group" "external_proxy" {
+  provider=google-beta
   name                  = "tf-test-network-endpoint%{random_suffix}"
   network_endpoint_type = "INTERNET_FQDN_PORT"
   default_port          = "443"
 }
 
 resource "google_compute_global_network_endpoint" "proxy" {
+  provider=google-beta
   global_network_endpoint_group = google_compute_global_network_endpoint_group.external_proxy.id
   fqdn                          = "test.example.com"
   port                          = google_compute_global_network_endpoint_group.external_proxy.default_port
 }
 
 resource "google_compute_backend_service" "default" {
+  provider=google-beta
   name                            = "tf-test-backend-service%{random_suffix}"
   enable_cdn                      = true
   timeout_sec                     = 10

website/docs/r/compute_backend_service.html.markdown

@@ -171,18 +171,21 @@ resource "google_compute_health_check" "health_check" {
 
 ```hcl
 resource "google_compute_global_network_endpoint_group" "external_proxy" {
+  provider=google-beta
   name                  = "network-endpoint"
   network_endpoint_type = "INTERNET_FQDN_PORT"
   default_port          = "443"
 }
 
 resource "google_compute_global_network_endpoint" "proxy" {
+  provider=google-beta
   global_network_endpoint_group = google_compute_global_network_endpoint_group.external_proxy.id
   fqdn                          = "test.example.com"
   port                          = google_compute_global_network_endpoint_group.external_proxy.default_port
 }
 
 resource "google_compute_backend_service" "default" {
+  provider=google-beta
   name                            = "backend-service"
   enable_cdn                      = true
   timeout_sec                     = 10
@@ -263,7 +266,7 @@ The following arguments are supported:
   requests.
 
 * `custom_response_headers` -
-  (Optional)
+  (Optional, [Beta](https://terraform.io/docs/providers/google/guides/provider_versions.html))
   Headers that the HTTP/S load balancer should add to proxied
   responses.