test: add job to run e2e and integration tests daily for validating kong images

[randmonkey]

What this PR does / why we need it:

Adds a daily workflow to run e2e tests and integration tests on KIC 2.12 LTS against Kong 2.8 LTS and Kong 3.4 LTS to verify compatibility.

Which issue this PR fixes:

fixes #5286

Special notes for your reviewer:

• We need to enable this after KIC 2.12.3 releases Release v2.12.3 #5257 to include the fixes.
• Do we need to run against on kubernetes versions and GKE clusters?

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

• the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a4f82f6) 75.9% compared to head (ab4d2f3) 75.8%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #5317     +/-   ##
=======================================
- Coverage   75.9%   75.8%   -0.1%     
=======================================
  Files        170     170             
  Lines      19447   19447             
=======================================
- Hits       14767   14757     -10     
- Misses      3851    3858      +7     
- Partials     829     832      +3     

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[pmalek]

Do we need to run against on kubernetes versions and GKE clusters?

I believe at least for starters we can "just" run this as usual on kind. We can add e.g. running on GKE when the pipeline proves to be stable.

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@randmonkey Is this still blocked on something?