[llvm-branch-commits] [Remarks] Restructure bitstream remarks to be fully standalone (PR #156715)

[Tobias Stadler via llvm-branch-commits]

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tobias-stadler wrote:

Until we figure out a better testing methodology for dsymutil, I'd like to land this with the blob tests to unblock further work on the remarks infra.

https://github.com/llvm/llvm-project/pull/156715