remove trigger image validation by label

[randmonkey]

What this PR does / why we need it:

Which issue this PR fixes:

Special notes for your reviewer:

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.
✅ Project coverage is 78.4%. Comparing base (03482d6) to head (7f724cf).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #7887     +/-   ##
=======================================
- Coverage   80.9%   78.4%   -2.6%     
=======================================
  Files        222     222             
  Lines      20791   20791             
=======================================
- Hits       16829   16308    -521     
- Misses      2895    3450    +555     
+ Partials    1067    1033     -34     

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[team-k8s-bot]

The backport to release/3.4.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-release/3.4.x release/3.4.x
# Navigate to the new working tree
cd .worktrees/backport-release/3.4.x
# Create a new branch
git switch --create backport-7887-to-release/3.4.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 0c0013e764eb7f91adef63ef66c52ca3f6553c57
# Push it to GitHub
git push --set-upstream origin backport-7887-to-release/3.4.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-release/3.4.x

Then, create a pull request where the base branch is release/3.4.x and the compare/head branch is backport-7887-to-release/3.4.x.

[team-k8s-bot]

The backport to release/3.5.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-release/3.5.x release/3.5.x
# Navigate to the new working tree
cd .worktrees/backport-release/3.5.x
# Create a new branch
git switch --create backport-7887-to-release/3.5.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 0c0013e764eb7f91adef63ef66c52ca3f6553c57
# Push it to GitHub
git push --set-upstream origin backport-7887-to-release/3.5.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-release/3.5.x

Then, create a pull request where the base branch is release/3.5.x and the compare/head branch is backport-7887-to-release/3.5.x.