Make build environment cache friendly

Arran Walkerrequested to merge
38323-make-build-test-environment-cache-friendly into main

What does this MR do?

Adds changes outlined in #38323 (closed)

Go test caching is still being invalidated by some flags splitic uses, but this is outside of our control. That will fixed in Go 1.24.

Closes #38323 (closed)

Edited by Arran Walker

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