ci: remove docker builds from merge queue

[falcorocks]

Summary

Remove docker build jobs from merge queue trigger. They already run on PRs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.0%. Comparing base (24112cf) to head (bd3acd7).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #19082     +/-   ##
==========================================
- Coverage     76.3%    76.0%   -0.4%     
==========================================
  Files          188      188             
  Lines        10943    10943             
==========================================
- Hits          8359     8326     -33     
- Misses        2438     2473     +35     
+ Partials       146      144      -2     

Flag	Coverage Δ
cannon-go-tests-64	66.4% <ø> (-0.9%)	⬇️
contracts-bedrock-tests	81.7% <ø> (ø)

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see 5 files with indirect coverage changes

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