feat: make retryable gRPC error codes configurable for gRPC exporters

[herin049]

Description

Add support for configuring the retry-able gRPC error codes for gRPC exporters.

Fixes #4904

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Relevant unit tests have been added.

Does This PR Require a Contrib Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added

[tammy-baylis-swi]

Would it be feasible to also support this config by env var? Maybe something like OTEL_PYTHON_EXPORTER_OTLP_GRPC_RETRYABLE_ERROR_CODES, which is quite long but similar to other grpc exporter env vars.

[herin049]

Would it be feasible to also support this config by env var? Maybe something like OTEL_PYTHON_EXPORTER_OTLP_GRPC_RETRYABLE_ERROR_CODES, which is quite long but similar to other grpc exporter env vars.

Definitely, I can add this!

[tammy-baylis-swi]

Overall lgtm as a nice, simple, experimental feature.

[MikeGoldsmith]

Looks good 👍🏻

[kasium]

Can someone please have a look on the CI? The feature is really needed by me :-)

[herin049]

Can someone please have a look on the CI? The feature is really needed by me :-)

@kasium Just waiting for a maintainer to merge this in, should be merged shortly.