test: deflake test-run-watch-cwd-isolation-none-*

[aduh95]

Before this PR, on my machine:

$ tools/test.py --repeat 999 test/test-runner/test-run-watch-cwd-isolation-none.mjs test/test-runner/test-run-watch-cwd-isolation-none-argv.mjs
[…]
[00:57|% 100|+ 1364|- 634]: Done
[…]

With this PR:

$ tools/test.py --repeat 999 test/test-runner/test-run-watch-cwd-isolation-none.mjs test/test-runner/test-run-watch-cwd-isolation-none-argv.mjs
[01:03|% 100|+ 1998|-   0]: Done                                          

All tests passed.

Refs: #66056

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.24%. Comparing base (7203d9b) to head (b2e7b65).
⚠️ Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #66035      +/-   ##
==========================================
+ Coverage   89.61%   90.24%   +0.63%     
==========================================
  Files         789      789              
  Lines      270476   271428     +952     
  Branches    51619    51800     +181     
==========================================
+ Hits       242393   244963    +2570     
+ Misses      18449    16935    -1514     
+ Partials     9634     9530     -104     

see 137 files with indirect coverage changes

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[panva]

Drop the test/common/watch.js changes and it should be good to go. Plus an update to test/test-runner/test-runner.status is due

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/77532/

[aduh95]

00:05:07.232 not ok 1395 test-runner/test-run-watch-cwd-isolation-none
00:05:07.232   ---
00:05:07.232   duration_ms: 729.99900
00:05:07.233   severity: fail
00:05:07.233   exitcode: 1
00:05:07.233   stack: |-
00:05:07.233   ...

Humpf failure on Windows

[aduh95]

I don't have a win-arm64 machine, and I wasn't able to reproduce to x86:

> python.exe .\tools\test.py --shell=../v27.0.0-nightly2026090729667e046b/win-x64/node.exe --repeat 9999 test/test-runner/test-run-watch-cwd-isolation-none.mjs test/test-runner/test-run-watch-cwd-isolation-none-argv.mjs
[17:27|% 100|+ 19998|-   0]: Done

I guess I'll mark it as flaky on that platform and move on

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/77556/
Stress test CI: https://ci.nodejs.org/view/Stress/job/node-stress-single-test/893/