ci: remove grafana-image-renderer 3.4.0 from integration test

[ashnamehrotra]

Describe the changes in this pull request using active verbs such as Add, Remove, Replace ...
Temporarily remove docker.io/grafana/grafana-image-renderer:3.4.0 from integration tests due to #877

Closes #<issue_ID>

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.98%. Comparing base (daacfdd) to head (fa92074).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #878   +/-   ##
=======================================
  Coverage   46.98%   46.98%           
=======================================
  Files          18       18           
  Lines        2205     2205           
=======================================
  Hits         1036     1036           
  Misses       1111     1111           
  Partials       58       58           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.