Implements getAllLocators

[arcanis]

What's the problem this PR addresses?

FSEvents currently iterates over the packages by crawling the tree recursively. While it's a valid strategy (although we're visiting too many nodes, cf #1826), it's also somewhat overkill since the PnP API already has the list of all locators.

How did you fix it?

Implements a getAllLocators function that returns the list of locators from the internal state. I tried using a generator, but raw arrays ended up being faster, and probably more convenient anyway.

Supercedes #1826

Checklist

• I have read the Contributing Guide.

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

• I have verified that all automated PR checks pass.

[remorses]

Thank you for the optimization of fsevents-patch

I tired to update yarn to use latest fsevents patch with yarn set version from sources but there is still the old fsevents patch in the .yarn/unplugged folder, even after deleting unplugged folder and reinstalling

How can i update yarn to use the latest fsevents patch?

[arcanis]

Hey! It turns out I forgot to regenerate the builtin patchfile from the new sources - I'll do it as part of #1886, once it's landed you'll be able to use yarn set version from sources as expected 😃