[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 https://github.com/open-telemetry/opentelemetry-collector/issues/9252 and https://github.com/open-telemetry/opentelemetry-collector/issues/9896

Testing

Tests ran

[codecov[bot]]

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 :warning:

Additional details and impacted files

```diff @@ 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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