[llvm-branch-commits] [llvm] [polly] release/21.x: [CI][Github] Set SCCACHE_IDLE_TIMEOUT to 0 (#150508) (PR #150947)

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llvmbot wrote:

@cmtice @andykaylor @Keenuts @Keenuts @cmtice What do you think about merging this PR to the release branch?

https://github.com/llvm/llvm-project/pull/150947