chore: add gw 3.12 in ee integration test matrix

[Prashansa-K]

Summary

SUMMARY_GOES_HERE

Full changelog

• [Implement ...]
• [Fix ...]

Issues resolved

Fix #XXX

Documentation

• Link to the website documentation PR

Testing

• Unit tests
• E2E tests
• Manual testing on Universal
• Manual testing on Kubernetes

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 28.62%. Comparing base (ed7600c) to head (2e9b5c3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #348   +/-   ##
=======================================
  Coverage   28.62%   28.62%           
=======================================
  Files         117      117           
  Lines       18941    18941           
=======================================
  Hits         5422     5422           
  Misses      12915    12915           
  Partials      604      604           

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