Reduce windows cache size + add options needed for wasm build of CppInterOp on Windows to llvm cache

[mcbarton]

@vgvassilev This PR contains 2 commits. One should reduce the size of the llvm cache on Windows. The second changes the options when building llvm on Windows to allow a wasm build of CppInterOp on Windows to be added to the ci in a future PR. To test this PR you will need to clear the Windows builds in the cache, and rerun in workflow manually.

[vgvassilev]

@vgvassilev This PR contains 2 commits. One should reduce the size of the llvm cache on Windows. The second changes the options when building llvm on Windows to allow a wasm build of CppInterOp on Windows to be added to the ci in a future PR. To test this PR you will need to clear the Windows builds in the cache, and rerun in workflow manually.

@mcbarton, done, let's see...

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.37%. Comparing base (f93e7b6) to head (3bac975).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #249      +/-   ##
==========================================
- Coverage   87.65%   79.37%   -8.29%     
==========================================
  Files           4        8       +4     
  Lines        1742     2982    +1240     
==========================================
+ Hits         1527     2367     +840     
- Misses        215      615     +400     

see 8 files with indirect coverage changes

see 8 files with indirect coverage changes

[mcbarton]

@vgvassilev This PR works as intended so can be merged now. I recommend you clear the cache before merging, when no other workflows are running. @alexander-penev @maximusron I also recommend you put in no new PRs, or commits to current PRs until the cache has been rebuilt after merging. This is to stop these PRs making there own cache, which will overwhelm the cache size limit.