Test/processes that create files that aren't in temp directories

[Trott]

Find and eliminate tests/processes that create files that aren’t in temp directories or other expected places. (Example: make test-addons creates files in test/addons.)

/cc @thealphanerd

[MylesBorins]

I'm into helping on this one.

[Trott]

Checked this in a rough way by running make test in one terminal window on macOS while running sudo fs_usage -w | grep node | egrep '\bopen\b' | grep W | grep -v /dev/ in another terminal window and then lots of manual review of the results. Number of problematic files found is fewer than I expected. PRs coming soon.

[Trott]

nodejs/node#17808

[Trott]

nodejs/node#17810

[Trott]

nodejs/node#17811

And that's the last of them, as far as I can tell. Closing.