[worker] add yarn-link script for worker/eas-build local dev

[hSATAC]

Why

When develop locally, it's often we need to use a local version of eas-build instead of the published one.

How

Move the old yarn link script here.

Test Plan

Develop locally.

[github-actions]

Subscribed to pull request

File Patterns	Mentions
**/*	@douglowder

Generated by CodeMention

[github-actions]

⏩ The changelog entry check has been skipped since the "no changelog" label is present.

[github-actions]

Size Change: -100 B (0%)

Total Size: 53.3 MB

Filename	Size	Change
./packages/eas-cli/dist/eas-linux-x64.tar.gz	53.3 MB	-100 B (0%)

_{compressed-size-action}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.61%. Comparing base (460f98d) to head (055b354).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3302   +/-   ##
=======================================
  Coverage   49.61%   49.61%           
=======================================
  Files         671      671           
  Lines       27979    27979           
  Branches     5788     5788           
=======================================
  Hits        13878    13878           
  Misses      12911    12911           
  Partials     1190     1190           

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[sjchmiela]

Soon #3290