Fix Playwright install step

[Gudahtt]

The Playwright install step run in the test-storybook job has been updated to ensure that we are running the correct install command. Previously we were using yarn dlx, which would use the latest version of Playwright rather than the one currently installed. Instead now we are using yarn exec, which will invoke the playwright binary from the locally installed package. This binary has an install command that completes the necessary setup, which is to install custom patched browsers for Playwright to run.

Manual Testing Steps

This is meant to fix a CI failure, so CI should be sufficient to show that this is working.

Pre-merge author checklist

• I've clearly explained:
  • What problem this PR is solving
  • How this problem was solved
  • How reviewers can test my changes
• Sufficient automated test coverage has been added

Pre-merge reviewer checklist

• Manual testing (e.g. pull and build branch, run in browser, test code being changed)
• PR is linked to the appropriate GitHub issue
• IF this PR fixes a bug in the release milestone, add this PR to the release milestone

If further QA is required (e.g. new feature, complex testing steps, large refactor), add the Extension QA Board label.

In this case, a QA Engineer approval will be be required.

[metamaskbot]

Builds ready [473a612]

• builds: chrome, firefox
• builds (beta): chrome, firefox
• builds (flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4
  • common: 0, 1, 2, 3, 4, 5
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1447 ± 120 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	120	172	145	17	8
		domContentLoaded	1080	1806	1410	242	116
		load	1135	1892	1447	250	120
		domInteractive	1080	1806	1410	242	116

Bundle size diffs

• background: 0 bytes
• ui: 0 bytes
• common: 0 bytes

[codecov-commenter]

Codecov Report

Merging #17415 (473a612) into develop (3d87f65) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff            @@
##           develop   #17415   +/-   ##
========================================
  Coverage    59.80%   59.80%           
========================================
  Files          936      936           
  Lines        35797    35797           
  Branches      9228     9228           
========================================
  Hits         21406    21406           
  Misses       14391    14391           

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