{npm,yarn}_install: add note that exports_directories_only is incompatible with RE

[Yannic]

If enabled, only the top-level directories will be uploaded as inputs, so the remote action will see an empty directory under node_modules and fail.

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• [ ] Bugfix
• [ ] Feature (please, look at the "Scope of the project" section in the README.md file)
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [x] Documentation content changes
• [ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• [ ] Yes
• [ ] No

Other information

[alexeagle]

Hm, this seems like a bug. Our understanding was that copying the folders made it work with RBE and these tests are being run on Google cloud RBE via Bazel CI

[github-actions[bot]]

This Pull Request has been automatically marked as stale because it has not had any activity for 6 months. It will be closed if no further activity occurs in 30 days. Collaborators can add a "cleanup" or "need: discussion" label to keep it open indefinitely. Thanks for your contributions to rules_nodejs!

[github-actions[bot]]

This PR was automatically closed because it went 30 days without any activity since it was labeled "Can Close?"