Update github actions for E2E test

[andreia-ferreira]

Towards #3365

This PR updates the existing GitHub action files for the E2E test, taking into account a new action from ground-platform that starts the Firebase emulator with prefilled data for the tests. This is added to the ground-platform repository here: google/ground-platform#2327

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.95%. Comparing base (ecbc0e8) to head (d4c9f2d).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #3429   +/-   ##
=========================================
  Coverage     69.95%   69.95%           
  Complexity     1599     1599           
=========================================
  Files           319      319           
  Lines          8585     8585           
  Branches        945      945           
=========================================
  Hits           6006     6006           
  Misses         2005     2005           
  Partials        574      574           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.