Assorted module fixes (#1045)

* net-ilb-l7 use both neg types in backends

* run example tests on cloud-config-container modules

* streamline nginx-tls cos module

* add tests for cos modules

* tfdoc

* onprem needs fixing, links

* disable test

* test

modules/cloud-config-container/__need_fixing/onprem/versions.tf

@@ -0,0 +1,29 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+terraform {
+  required_version = ">= 1.3.1"
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = ">= 4.40.0" # tftest
+    }
+    google-beta = {
+      source  = "hashicorp/google-beta"
+      version = ">= 4.40.0" # tftest
+    }
+  }
+}
+
+