[python][CI] improve CI performance

[msyyc]

It usually takes more than 50 minutes in CI of http-client-python which is too long:

I think we could refer to typespec-python to run CI jobs in parallel to reduce CI time.

[github-actions]

🎯 Issue Triage

Request to improve CI performance for http-client-python by parallelizing CI jobs, similar to how typespec-python runs them, as the current CI takes over 50 minutes.

Category: Feature Request

Area: emitter:client:python

🔍 Analysis

• The issue reports CI runtime exceeding 50 minutes for http-client-python
• The suggestion is to parallelize CI jobs, referencing typespec-python as the model
• This is an engineering/infrastructure improvement, not a code bug
• Impact: slower developer feedback loops and higher CI resource consumption

📝 Suggested next steps

• Review how typespec-python parallelizes its CI jobs
• Identify which jobs in http-client-python CI can run concurrently
• Implement parallelization in the CI workflow configuration

Generated by Agentic Triage

[timotheeguerin]

as we moved to github actions in typespec-azure, there is an equivalent to typespec-ci that dispatch to right areas if you want to use about the same workflows