[sapling] run .t tests for getdeps sapling cli build

[ahornby]

Summary:
Connect up the sapling *.t tests so that github CI has visible cli test status.

To get them to run:

• some needed fbpython on path. I included a shim for that in the test makefile target.
• tests using testrepohg/testrepohgenv assumed a system hg was present since b71ac97, changed that to check if system hg present for internal runs.
• test-rust-hooks: Command not found message in -added a glob
• test-identity.t: add a glob for the sapling version
• excluded a few remaining tests (see comments in Makefile)

NB the tests run as "hg". The expectations would need to be updated if we were to run as "sl"

This makes the tests runnable with:
./build/fbcode_builder/getdeps.py --allow-system-packages test --src-dir=. sapling --num-jobs=48 --retry 0

Test Plan:

enter ubuntu 22.04 toolbox:
toolbox enter ubuntu-toolbox-22.04

make sure system packages are installed
./build/fbcode_builder/getdeps.py install-system-deps --recursive sapling

build sapling
./build/fbcode_builder/getdeps.py build --allow-system-packages --no-facebook-internal --src-dir=. sapling

run the tests. 48 was about max concurrency on my personal 64GB machine and took 4 mins. Setting less concurrency for CI.

./build/fbcode_builder/getdeps.py --allow-system-packages test --src-dir=. sapling --num-jobs=48
----------------------------------------------------------------------
Skipped 2 tests (missing feature: Mononoke server available):
  test-fb-ext-remotefilelog-log.t
  test-fb-ext-remotefilelog-worker.t

Skipped 3 tests (missing feature: running tests with fsmonitor):
  test-fsmonitor-filemerge.t
  test-fsmonitor-nonutf8-path.t
  test-rust-hgevents.t

Skipped 46 tests (skipped):
  test-atexit-epipe.t
  test-casefolding.t
  test-check-clang-format.t
  test-check-code.t
  test-check-fix-code.t
  test-check-help.t
  test-checkserverbookmark.t
  test-chg.t
  test-debugbacktrace.t
  test-debugshell-namespace.t
  test-eden-clone.t
  test-eden-commands.t
  test-eden-du.t
  test-eden-glob.t
  test-eden-sparse.t
  test-eden-watchman-edenapi-glob.t
  test-eden-watchman-noedenapi-glob.t
  test-fb-ext-fbconduit.t
  test-fb-ext-scm-prompt-compat.t
  test-fb-ext-scm-prompt-git.t
  test-fb-ext-tweakdefaults-grep.t
  test-fsmonitor-casefolding.t
  test-fsmonitor-fallback.t
  test-fsmonitor-metadata.t
  test-fsmonitor-refreshclock.t
  test-fsmonitor-status.t
  test-fsmonitor-warn-fresh.t
  test-histedit-reorder.t
  test-matcher-expand-globs.t
  test-mutation-infinitepush.t
  test-non-working-symlink.t
  test-progress-rust-renderer.t
  test-progressfile.t
  test-purge-fsmonitor.t
  test-remotenames-journal.t
  test-runlog.t
  test-rust-status-in-transaction.t
  test-sparse-track-ignored.t
  test-status-case-insensitive.t
  test-status-fresh-instance.t
  test-status-root-ignored-py.t
  test-status-watchman.t
  test-symlink-migration.t
  test-tracing-under-chg.t
  test-treestate-fresh-instance.t
  test-treestate-trackignore.t

# Ran 736 tests, 51 skipped, 0 failed.
passed on try 0

generate github actions CI

./build/fbcode_builder/getdeps.py --allow-system-packages generate-github-actions --free-up-disk --os-type=linux --src-dir=. --output-dir=.github/workflows --job-name "Sapling CLI Getdeps " --job-file-prefix=sapling-cli-getdeps_ sapling --num-jobs=16  --project-install-prefix sapling:/