fix: Don't ignore Yarn patch files

[mcmire]

An earlier commit modified .gitignore to ignore .yarn files in development/generate-attributions (which is a special sub-project in this repo used in the attribution generation workflow). However, this change ended up ignoring Yarn patch files in .yarn/patches (along with possibly other Yarn-specific files). This commit narrows the pattern in .gitignore not to do this.

Description

Related issues

See #24390 for PR that introduced the bug that this fixes.

Manual testing steps

1. Add a file to .yarn/patches.
2. Run git status.
3. You should not see it ignored.

Screenshots/Recordings

(None)

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.38%. Comparing base (85783b1) to head (802ae6f).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #25398   +/-   ##
========================================
  Coverage    65.38%   65.38%           
========================================
  Files         1382     1382           
  Lines        54765    54765           
  Branches     14367    14367           
========================================
  Hits         35807    35807           
  Misses       18958    18958           

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[Gudahtt]

LGTM!

[metamaskbot]

Builds ready [802ae6f]

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• bundle viz:

  • background: 0, 1, 2, 3, 4, 5
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
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  • ui: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (47 ± 4 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	64	109	76	11	5
		domContentLoaded	8	21	10	3	1
		load	38	70	47	7	4
		domInteractive	8	21	10	3	1

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)