feat: Add REST Interceptors which support reading metadata

feat: Add support for reading selective GAPIC generation methods from service YAML
chore: Update gapic-generator-python to v1.22.0

PiperOrigin-RevId: 724026024

Author: Google APIs

WORKSPACE

@@ -314,9 +314,9 @@ load("@rules_gapic//python:py_gapic_repositories.bzl", "py_gapic_repositories")
 
 py_gapic_repositories()
 
-_gapic_generator_python_version = "1.21.0"
+_gapic_generator_python_version = "1.22.0"
 
-_gapic_generator_python_sha256 = "3d699e92bf6b6b30da8be030900cfbe293b7d0bfa2a26c580ee790f51ae593df"
+_gapic_generator_python_sha256 = "b2713f25834534029aeb2c6b829ea3efccc5216cf368376c040e28d7cae60322"
 
 http_archive(
     name = "gapic_generator_python",