test(snapshots): remove the parked snap-tests-todo tree

[fengmk2]

The three cases (command-pack-watch-restart,
exit-non-zero-on-cmd-not-exists, pnpm-install-with-options) were parked
outside every runner: nothing in the repo references the directory and
no CI job executes it. The PTY suite already covers install-with-options
flows per package manager and command-not-found exits; recover the
watch-restart case from history if it becomes automatable.

Part of #2116.

[fengmk2]

• test(snapshots): remove the parked snap-tests-todo tree #2145 👈 (View in Graphite)
• test(snapshots): migrate the last blocked snap tests to the PTY suite #2143
• test(snapshots): migrate the command-* package-manager passthrough cases #2141
• test(snapshots): migrate the command-* toolchain cases to the PTY snapshot suite #2138
• main

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[graphite-app]

Merge activity

• Jul 10, 2:05 PM UTC: fengmk2 added this pull request to the Graphite merge queue.
• Jul 10, 2:24 PM UTC: The Graphite merge queue couldn't merge this PR because it was not satisfying all requirements (Failed CI: 'done', 'CLI snapshot test (Windows)').