[cicd] add pip caching for cross-language validation workflow #1597
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Add cache-dependency-path to setup-python action and move pip install to a dedicated workflow step. This fixes ~13 minute delay caused by uncached grpcio package downloads.
Add cache-dependency-path to setup-python action and move pip install
to a dedicated workflow step.
The apt-get upgrade was upgrading 80+ unrelated system packages (Firefox, PHP, gnupg, etc.) taking ~2 minutes. Only build-essential is needed as a fallback for compiling Python wheels on cache miss.
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What's new?
Reduces Cross-Language Tests job runtime from ~17 minutes to ~3 minutes by fixing ineffective pip caching.