Allow rate limit changes for inCluster mode

[joaobologna]

What does this PR do?

Allow rate limit changes for inCluster mode:

• With this change, users can tune the default values for rate limit even in inCluster mode.
• This is not a breaking change as the configs are inserted externally, e.g. env vars.
• No test can be added without major changes to the methods' signatures as the kubernetes client will attempt to get configs and certificates from env vars and files that are not easily mocked.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 14 lines in your changes are missing coverage. Please review.

Project coverage is 82.79%. Comparing base (78254ce) to head (860d5db).

Files	Patch %	Lines
internal/service/adapters.go	0.00%	14 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #606 +/- ## ========================================== - Coverage 82.95% 82.79% -0.17% ========================================== Files 85 85 Lines 5604 5615 +11 ========================================== Hits 4649 4649 - Misses 768 779 +11 Partials 187 187 ```

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