Build LLVM as shared library on Windows

Workflow runs for Build LLVM as shared library on Windows

• [wip] Apply all remaining LLVM_ABI annotations to build, tests, tools and benchmarks

  failed:
  Build LLVM as shared library on Windows#1:Pull request#189946openedbymcbarton
  mcbarton:main_new

  Apr 1, 20261h 3m 45s
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