Install image builder in CI

[pingsutw]

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• I updated the documentation accordingly.
• All new and existing tests passed.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.00%. Comparing base (ba88e82) to head (a7921f3).
Report is 128 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5487      +/-   ##
==========================================
- Coverage   61.01%   61.00%   -0.01%     
==========================================
  Files         793      793              
  Lines       51419    51419              
==========================================
- Hits        31372    31370       -2     
- Misses      17155    17156       +1     
- Partials     2892     2893       +1     

Flag	Coverage Δ
unittests-datacatalog	69.31% <ø> (ø)
unittests-flyteadmin	58.75% <ø> (ø)
unittests-flytecopilot	17.79% <ø> (ø)
unittests-flytectl	68.04% <ø> (ø)
unittests-flyteidl	79.04% <ø> (ø)
unittests-flyteplugins	61.83% <ø> (ø)
unittests-flytepropeller	57.30% <ø> (ø)
unittests-flytestdlib	65.75% <ø> (-0.06%)	⬇️

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