Artifact Registry: add version policy support for maven (#5294) (#11246)

* Artifact Registry: add version policy support for maven

* Artifact Registry: add version policy support for maven

* Fixing description

* tests

* Fixing camelcase to snake case

* Update mmv1/third_party/terraform/tests/resource_artifact_registry_repository_test.go.erb

Co-authored-by: Stephen Lewis (Burrows) <stephen.r.burrows@gmail.com>

* Update mmv1/products/artifactregistry/api.yaml

Co-authored-by: Stephen Lewis (Burrows) <stephen.r.burrows@gmail.com>

* Update mmv1/products/artifactregistry/api.yaml

Co-authored-by: Stephen Lewis (Burrows) <stephen.r.burrows@gmail.com>

* Update mmv1/products/artifactregistry/api.yaml

Co-authored-by: Stephen Lewis (Burrows) <stephen.r.burrows@gmail.com>

* Resolving comments

* Addressing comments

* Restricting modifications for allowSnapshotsOverwrite

* fixing test names

* Fixing tests

Co-authored-by: Yury Gridasov <gridasov@google.com>
Co-authored-by: Stephen Lewis (Burrows) <stephen.r.burrows@gmail.com>
Signed-off-by: Modular Magician <magic-modules@google.com>

Co-authored-by: Yury Gridasov <gridasov@google.com>
Co-authored-by: Stephen Lewis (Burrows) <stephen.r.burrows@gmail.com>

.changelog/5294.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+artifactregistry: added maven config for `google_artifact_registry_repository`
+```

website/docs/r/artifact_registry_repository.html.markdown

@@ -154,10 +154,30 @@ The following arguments are supported:
   `projects/my-project/locations/my-region/keyRings/my-kr/cryptoKeys/my-key`.
   This value may not be changed after the Repository has been created.
 
+* `maven_config` -
+  (Optional)
+  MavenRepositoryConfig is maven related repository details.
+  Provides additional configuration details for repositories of the maven
+  format type.
+  Structure is [documented below](#nested_maven_config).
+
 * `project` - (Optional) The ID of the project in which the resource belongs.
     If it is not provided, the provider project is used.
 
 
+<a name="nested_maven_config"></a>The `maven_config` block supports:
+
+* `allow_snapshot_overwrites` -
+  (Optional)
+  The repository with this flag will allow publishing the same
+  snapshot versions.
+
+* `version_policy` -
+  (Optional)
+  Version policy defines the versions that the registry will accept.
+  Default value is `VERSION_POLICY_UNSPECIFIED`.
+  Possible values are `VERSION_POLICY_UNSPECIFIED`, `RELEASE`, and `SNAPSHOT`.
+
 ## Attributes Reference
 
 In addition to the arguments listed above, the following computed attributes are exported: