chore: carve out sub-modules (#4635)

This commit will be tagged:

v0.92.3
cloudbuild/v0.1.0
monitoring/v0.1.0
secretmanager/v0.1.0
video/v0.1.0
security/v0.1.0
gkehub/v0.1.0
gkeconnect/v0.1.0
area120/v0.1.0
analytics/v0.1.0

analytics/CHANGES.md

@@ -0,0 +1,6 @@
+# Changes
+
+## v0.1.0
+
+This is the first tag to carve out analytics as its own module. See
+[Add a module to a multi-module repository](https://github.com/golang/go/wiki/Modules#is-it-possible-to-add-a-module-to-a-multi-module-repository).

analytics/README.md

@@ -0,0 +1,40 @@
+# Analytics API
+
+[![Go Reference](https://pkg.go.dev/badge/cloud.google.com/go/analytics.svg)](https://pkg.go.dev/cloud.google.com/go/analytics)
+
+Go Client Library for Analytics API.
+
+## Install
+
+```bash
+go get cloud.google.com/go/analytics
+```
+
+## Stability
+
+The stability of this module is indicated by SemVer.
+
+However, a `v1+` module may have breaking changes in two scenarios:
+
+* Packages with `alpha` or `beta` in the import path
+* The GoDoc has an explicit stability disclaimer (for example, for an experimental feature).
+
+## Go Version Support
+
+See the [Go Versions Supported](https://github.com/googleapis/google-cloud-go#go-versions-supported)
+section in the root directory's README.
+
+## Authorization
+
+See the [Authorization](https://github.com/googleapis/google-cloud-go#authorization)
+section in the root directory's README.
+
+## Contributing
+
+Contributions are welcome. Please, see the [CONTRIBUTING](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/master/CONTRIBUTING.md)
+document for details.
+
+Please note that this project is released with a Contributor Code of Conduct.
+By participating in this project you agree to abide by its terms. See
+[Contributor Code of Conduct](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/master/CONTRIBUTING.md#contributor-code-of-conduct)
+for more information.

analytics/go.mod

@@ -0,0 +1,12 @@
+module cloud.google.com/go/analytics
+
+go 1.16
+
+require (
+	cloud.google.com/go v0.92.3
+	github.com/googleapis/gax-go/v2 v2.0.5
+	google.golang.org/api v0.54.0
+	google.golang.org/genproto v0.0.0-20210813162853-db860fec028c
+	google.golang.org/grpc v1.39.1
+	google.golang.org/protobuf v1.27.1
+)

analytics/go_mod_tidy_hack.go

@@ -0,0 +1,22 @@
+// Copyright 2021 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
+//
+//      http://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.
+
+// This file, and the cloud.google.com/go import, won't actually become part of
+// the resultant binary.
+// +build modhack
+
+package analytics
+
+// Necessary for safely adding multi-module repo. See: https://github.com/golang/go/wiki/Modules#is-it-possible-to-add-a-module-to-a-multi-module-repository
+import _ "cloud.google.com/go"

area120/CHANGES.md

@@ -0,0 +1,6 @@
+# Changes
+
+## v0.1.0
+
+This is the first tag to carve out area120 as its own module. See
+[Add a module to a multi-module repository](https://github.com/golang/go/wiki/Modules#is-it-possible-to-add-a-module-to-a-multi-module-repository).

area120/README.md

@@ -0,0 +1,40 @@
+# Area120 API
+
+[![Go Reference](https://pkg.go.dev/badge/cloud.google.com/go/area120.svg)](https://pkg.go.dev/cloud.google.com/go/area120)
+
+Go Client Library for Area120 API.
+
+## Install
+
+```bash
+go get cloud.google.com/go/area120
+```
+
+## Stability
+
+The stability of this module is indicated by SemVer.
+
+However, a `v1+` module may have breaking changes in two scenarios:
+
+* Packages with `alpha` or `beta` in the import path
+* The GoDoc has an explicit stability disclaimer (for example, for an experimental feature).
+
+## Go Version Support
+
+See the [Go Versions Supported](https://github.com/googleapis/google-cloud-go#go-versions-supported)
+section in the root directory's README.
+
+## Authorization
+
+See the [Authorization](https://github.com/googleapis/google-cloud-go#authorization)
+section in the root directory's README.
+
+## Contributing
+
+Contributions are welcome. Please, see the [CONTRIBUTING](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/master/CONTRIBUTING.md)
+document for details.
+
+Please note that this project is released with a Contributor Code of Conduct.
+By participating in this project you agree to abide by its terms. See
+[Contributor Code of Conduct](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/master/CONTRIBUTING.md#contributor-code-of-conduct)
+for more information.

area120/go.mod

@@ -0,0 +1,12 @@
+module cloud.google.com/go/area120
+
+go 1.16
+
+require (
+	cloud.google.com/go v0.92.3
+	github.com/googleapis/gax-go/v2 v2.0.5
+	google.golang.org/api v0.54.0
+	google.golang.org/genproto v0.0.0-20210813162853-db860fec028c
+	google.golang.org/grpc v1.39.1
+	google.golang.org/protobuf v1.27.1
+)