Googleapis-artman

artman:
- feat: allow overriding --language_out parameter to protoc (810)

protoc-java-resource-name-plugin:
- stop generating resource name factories and untyped resource names

Java: stop generating subclasses for multi-pattern resources from gapic v2
Java: safeguard multi-pattern resources behing `betaApi`

Include the following feature from gapic-generator:
- sample and unit test generation for multi-pattern resources

- Fix the incorrect equals() override in multi-pattern resources

Including the following features from gapic-generator:

- Java: generate tests using the non-flattening overload if an rpc does not have flattening configuration (3087)
- Generate method overloads when a resource field has multiple resource associated (3081)
- Fix generated code for changing the timeout. (3078)
- bazel: Add support for prebuilt PHP binaries (3079)
- Add multi-pattern resource check for C (3080)

Including the following features from proto-java-resource-names-plugin:
- Support multi-pattern resource name with child_type

Bump ARTMAN_VERSION env var and protoc-docs-plugin version