fix: use the new default value for frontend/generated

[taefi]

Description

Use FrontendUtils.DEFAULT_PROJECT_FRONTEND_GENERATED_DIR instead of the literal value of frontend/generated.

Fixes #2167

Type of change

• [x] Bugfix
• [ ] Feature

Checklist

• [x] I have read the contribution guide: https://vaadin.com/docs/latest/guide/contributing/overview/
• [x] I have added a description following the guideline.
• [x] The issue is created in the corresponding repository and I have referenced it.
• [ ] I have added tests to ensure my change is effective and works as intended.
• [x] New and existing tests are passing locally with my change.
• [x] I have performed self-review and corrected misspellings.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.77%. Comparing base (dfd2c36) to head (d0acd23).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2180   +/-   ##
=======================================
  Coverage   93.77%   93.77%           
=======================================
  Files          64       64           
  Lines        1622     1622           
  Branches      364      364           
=======================================
  Hits         1521     1521           
  Misses         66       66           
  Partials       35       35           

Flag	Coverage Δ
unittests	93.77% <ø> (ø)

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[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[vaadin-bot]

This ticket/PR has been released with Hilla 24.4.0.alpha11 and is also targeting the upcoming stable 24.4.0 version.