Make sure the build repo is pulled in docker-build stage

[peterzhuamazon]

Signed-off-by: Peter Zhu zhujiaxi@amazon.com

Description

Make sure the build repo is pulled in docker-build stage.
Directly use agent node will have consequences where git repo is not pulled.
Running on docker container will force the pull every time.

Issues Resolved

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[codecov-commenter]

Codecov Report

Merging #2060 (02c1262) into main (ec6c37c) will increase coverage by 0.12%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #2060      +/-   ##
============================================
+ Coverage     94.10%   94.23%   +0.12%     
  Complexity       25       25              
============================================
  Files           198      198              
  Lines          3902     3902              
  Branches         29       29              
============================================
+ Hits           3672     3677       +5     
+ Misses          224      219       -5     
  Partials          6        6              

Impacted Files	Coverage Δ
src/system/os.py	100.00% <0.00%> (+6.25%)	⬆️
src/system/temporary_directory.py	96.77% <0.00%> (+12.90%)	⬆️

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[peterzhuamazon]

See OS build 2626 vs 2629 for docker build trigger comparison.