Perform deeper compiletest path normalization for $TEST_BUILD_DIR to account for compare-mode/debugger cases, and normalize long type file filename hashes

[jieyouxu]

Caution

This PR is stacked on top of #136474 and #136542, and may not be merged before they do, and would require a rebase.

Fixes #136510.

Summary

• Whereas previously $TEST_BUILD_DIR is a normalization of /path/to/build/test/<test_suite_name>/, we now more deeply normalize. $TEST_BUILD_DIR now becomes a normalization of /path/to/build/test/<test_suite_name>/<subdirs>/$name.$revision.$compare_mode.$debugger/ to normalize away path name differences when --compare-mode and/or --debugger are specified.
• We also centralize the normalization of long type name hashes

cf. #136328 (comment).

Review advice

• Best reviewed commit-by-commit.
• Split into 3 commits:
  • Commit 1: compiletest changes to have $TEST_BUILD_DIR more deeply normalize.
  • Commit 2: remove per-test hacks for long type path hash normalizations, and rebless tests specifically affected by that.
  • Commit 3: rebless other tests that were changed as a side-effect of deeper $TEST_BUILD_DIR normalizations.

Commit 2 is created via first finding tests that try to perform long type file hash normalizations on an ad hoc, per-test basis:

rg --no-ignore -l --no-ignore -F -e "long-type" tests/ui/**/*.rs   

Tests with ad hoc long-type hash normalizations

tests/ui/type_length_limit.rs
tests/ui/traits/on_unimplemented_long_types.rs
tests/ui/regions/issue-102374.rs
tests/ui/recursion/recursion.rs
tests/ui/recursion/issue-83150.rs
tests/ui/recursion/issue-23122-2.rs
tests/ui/methods/inherent-bound-in-probe.rs
tests/ui/issues/issue-67552.rs
tests/ui/issues/issue-37311-type-length-limit/issue-37311.rs
tests/ui/issues/issue-20413.rs
tests/ui/issues/issue-8727.rs
tests/ui/infinite/infinite-instantiation.rs
tests/ui/infinite/infinite-instantiation-struct-tail-ice-114484.rs
tests/ui/higher-ranked/trait-bounds/hrtb-doesnt-borrow-self-1.rs
tests/ui/higher-ranked/trait-bounds/hrtb-doesnt-borrow-self-2.rs
tests/ui/higher-ranked/trait-bounds/hang-on-deeply-nested-dyn.rs
tests/ui/error-codes/E0275.rs
tests/ui/diagnostic-width/secondary-label-with-long-type.rs
tests/ui/diagnostic-width/long-e0277.rs
tests/ui/diagnostic-width/non-copy-type-moved.rs
tests/ui/diagnostic-width/long-E0308.rs
tests/ui/diagnostic-width/E0271.rs
tests/ui/diagnostic-width/binop.rs

These ad hoc normalizations were removed, and they are reblessed.

r? @lqd

[jieyouxu]

@rustbot blocked (#136474, #136542)

[jieyouxu]

Closure LINE:COL numbers aren't normalized, not for this PR

[jieyouxu]

We're now normalizing deeper, so this is to be expected, otherwise you'd have crateresolve1.polonius for instance

[lqd]

Yeah that seems fine to me as well, it should be quite rare that we’re testing and looking for an actual path in diagnostics rather than the semantic contents of the output.

[jieyouxu]

Of course, the ui-fulldeps test suite exists.

[bors]

☔ The latest upstream changes (presumably #137001) made this pull request unmergeable. Please resolve the merge conflicts.

[jieyouxu]

This merge-conflicted against master, not sure what changed here 🤔 Maybe just line number differences?