[builder] make retries configurable for faster tests

[kristinapathak]

Description

When running tests, waiting for downloadModules() to fail 3 times when that's expected adds time to the test run. This updates tests to only attempt downloading once. Note: if there's a network failure that could cause downloadModules() to fail when it should normally succeed. Also the wording here is retries when in actuality it's the number of attempts. I didn't change this to keep the log wording the same, but I can change the wording if that's preferable.

Link to tracking issue

this will help for adding tests for #9252 and #9896

Testing

Tests ran

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 91.87%. Comparing base (326ef7c) to head (565a78c).
Report is 17 commits behind head on main.

Files	Patch %	Lines
cmd/builder/internal/builder/main.go	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10035      +/-   ##
==========================================
+ Coverage   91.55%   91.87%   +0.31%     
==========================================
  Files         360      360              
  Lines       16693    16728      +35     
==========================================
+ Hits        15284    15369      +85     
+ Misses       1073     1021      -52     
- Partials      336      338       +2     

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[mx-psi]

Thank you! Just one very minor comment :)