Add compilation of python schema and service libraries

[finnegancarroll]

Description

Adds the Bazel libraries for the compilation of protobuf schema and service definitions into python libraries. These changes do not include any packaging or publishing for the python libraries.

A few major changes are included in this PR to facilitate python support:

• Version bumped to Bazel 7.0.0.
  Bazel 7 includes changes to the Bazel language which resolves syntax errors in code invoked by rules_python which is necessary here. Higher versions of Bazel have migrated to Bazel Modules, to keep the existing WORKSPACE model bazelmod is disabled by default in .bazelrc.
• Migrate to rule_proto_grpc.
  https://github.com/rules-proto-grpc/rules_proto_grpc
  This actively maintained apache 2 licensed project provides support for multiple protobuf language rules. Java and python rules have been migrated to this project to avoid conflicting dependencies between each newly added language rule. Additionally dependencies have been removed from maven_install where possible so Bazel http archives are the single source of truth for dependencies.
• Dockerfile for platform independant building/testing.

Testing

Bazel commands

bazel build //:java_protos_all

bazel build //:python_protos_all

Docker stages for build/package/test

docker build --target build-bazel-java .

docker build --target package-bazel-java .

docker build --target test-bazel-java .

Note: The implementations in core are out of sync with this repo at the moment while this change is in flight.
If the OpenSearch version specified in the Dockerfile is updated to match this feature branch this test-bazel-java stage passes.

docker build --target build-bazel-python .

Note: Only a build stage for python is included in this version. Packaging and testing to be handled in follow up PRs.

Issues Resolved

#8

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[finnegancarroll]

@karenyrx , @lucy66hw can you take a look at these changes when convenient?

[karenyrx]

Thanks for adding this!

[finnegancarroll]

Hi @karenyrx, any additional feedback for these changes?

[finnegancarroll]

Hi @karenyrx, removed both patch files with some re-ordering and updated dependencies.
Let me know if you have any additional feedback on these changes. Thanks!