Unrolled build for #150201
Rollup merge of #150201 - Enselic:debugger-tests-revisions-2, r=Zalathar

compiletest: Support revisions in debuginfo (read: debugger) tests

And start using revisions in `tests/debuginfo/macro-stepping.rs` to prevent regressing both with and without `SingleUseConsts` MIR pass.

I recommend commit-by-commit review.

## ~TODO~

- [x] Verify this more carefully.
- [x] Possibly do some preparatory PRs before taking this PR out of draft.
    - [x] Rebase on https://github.com/rust-lang/rust/pull/150205 once merged so we don't have to add another "`+ 1`".

## CC

CC ``@Zalathar`` since you might have opinions about that I expose a helper function to reduce duplication

CC ``@saethlin`` since this is what we will use for `tests/debuginfo/basic-stepping.rs` in https://github.com/rust-lang/rust/pull/147426 (in the same way I use it in `tests/debuginfo/macro-stepping.rs` here)
tree: d87a277a1331c72fb92cc5b4d8cb065581d6185e
  1. .github/
  2. compiler/
  3. library/
  4. LICENSES/
  5. src/
  6. tests/
  7. .clang-format
  8. .editorconfig
  9. .git-blame-ignore-revs
  10. .gitattributes
  11. .gitignore
  12. .gitmodules
  13. .ignore
  14. .mailmap
  15. bootstrap.example.toml
  16. Cargo.lock
  17. Cargo.toml
  18. CODE_OF_CONDUCT.md
  19. configure
  20. CONTRIBUTING.md
  21. COPYRIGHT
  22. INSTALL.md
  23. LICENSE-APACHE
  24. license-metadata.json
  25. LICENSE-MIT
  26. package.json
  27. README.md
  28. RELEASES.md
  29. REUSE.toml
  30. rust-bors.toml
  31. rustfmt.toml
  32. triagebot.toml
  33. typos.toml
  34. x
  35. x.ps1
  36. x.py
  37. yarn.lock
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