fix: take mem snapshot in mem.spec when local run

[lumixraku]

close #xxx

take two heapsnapshot in univer root path when run mem.spec.ts locally

memory-first.heapsnapshot & memory-second.heapsnapshot

Pull Request Checklist

• Related tickets or issues have been linked in the PR description (or missing issue).
• Naming convention is followed (do please check it especially when you created new plugins, commands and resources).
• Unit tests have been added for the changes (if applicable).
• Breaking changes have been documented (or no breaking changes introduced in this PR).

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Playwright test results

 24 passed

Details

 24 tests across 11 suites
 5 minutes, 24 seconds
 8d3fb8a
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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 32.70%. Comparing base (3dc94a9) to head (8d3fb8a).

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #4594      +/-   ##
==========================================
- Coverage   32.71%   32.70%   -0.02%     
==========================================
  Files        2600     2600              
  Lines      135306   135306              
  Branches    30141    30141              
==========================================
- Hits        44271    44250      -21     
- Misses      91035    91056      +21     

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