trace: regenerate to include CL 691815

This CL makes the following changes to gen.bash:

- Clean up files at the start to make it easier to work on gen.bash.
  The only ones we don't clean up are gen.bash itself and the
  experimental version of the flight recorder.
- Copy the internal/diff package, which is a new test-only dependency.
- Replace the new test-only internal/testenv dependency with an inlined
  version of the only fuction the tests actually use, testenv.Builder().
- Replace the t.ArtifactDir call in the tests with t.TempDir.
  t.ArtifactDir is a Go 1.26+ API, and we don't want to require that
  yet. We generally don't expect these tests to break unlesss they were
  broken at the time we mirror the code, so we don't lose much with this
  change.

Fixes golang/go#76751

[git-generate]
cd trace
./gen.bash 54b82e9

Change-Id: I6a6a6964c10350dcab290b45f6481a26ed26d9be
Reviewed-on: https://go-review.googlesource.com/c/exp/+/724442
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
25 files changed
tree: be20becf82c572982c1b492910cb83d24c3914c3
  1. apidiff/
  2. cmd/
  3. constraints/
  4. ebnf/
  5. ebnflint/
  6. errors/
  7. event/
  8. inotify/
  9. io/
  10. jsonrpc2/
  11. maps/
  12. mmap/
  13. rand/
  14. shiny/
  15. shootout/
  16. slices/
  17. slog/
  18. stats/
  19. sumdb/
  20. trace/
  21. typeparams/
  22. utf8string/
  23. .gitattributes
  24. .gitignore
  25. codereview.cfg
  26. CONTRIBUTING.md
  27. go.mod
  28. go.sum
  29. LICENSE
  30. PATENTS
  31. README.md
README.md

exp

PkgGoDev

This subrepository holds experimental and deprecated (in the old directory) packages.

The idea for this subrepository originated as the pkg/exp directory of the main repository, but its presence there made it unavailable to users of the binary downloads of the Go installation. The subrepository has therefore been created to make it possible to go get these packages.

Warning: Packages here are experimental and unreliable. Some may one day be promoted to the main repository or other subrepository, or they may be modified arbitrarily or even disappear altogether.

In short, code in this subrepository is not subject to the Go 1 compatibility promise. (No subrepo is, but the promise is even more likely to be violated by go.exp than the others.)

Caveat emptor.