perf: remove obsolete forced unplug entries

[paul-soporan]

What's the problem this PR addresses?

This PR removes some entries from FORCED_UNPLUG_PACKAGES that are no longer needed:

• nan - already unplugged because of .h files
• node-gyp - already unplugged because of .cc files
• node-addon-api - already unplugged because of .h and .c files
• fsevents - already unplugged because of .node files and conditions
• node-pre-gyp doesn't need to be unplugged because nobody remembers the reason it was originally unplugged anymore and it doesn't currently include any code that would require it to be. The package has also been deprecated and renamed to @mapbox/node-pre-gyp which isn't on our list (and therefore isn't unplugged) and nobody has complained about it not working anymore. I've also done a quick check and both seem to work without unplugging.

How did you fix it?

Removed them.

Checklist

• I have read the Contributing Guide.

• I have set the packages that need to be released for my changes to be effective.

• I will check that all automated PR checks pass before the PR gets reviewed.

[merceyz]

I pushed a commit to trigger all the e2e tests just to be on the safe side regarding node-pre-gyp.

Edit: Test complete, Gatsby and Gulp failed due to #5177, Storybook hasn't worked for a long time, the rest was fine.

refactor:

One could argue it's a perf: since it's one less package to unplug.