[SDTEST-172] Refactor configs and components

[anmarchenko]

What does this PR do? Applies some refactorings:

• splits some code in components.rb in methods to make
• renames TestVisibility::Recorder to TestVisibility::Component
• renames ITR to TestOptimisation to make the name more generic
• renames ITR::Runner to TestOptimisation::Component

Motivation There are some topics that require attention before adding telemetry to the mix

How to test the change? Unit tests, no behavior change

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 99.15966% with 2 lines in your changes missing coverage. Please review.

Project coverage is 98.88%. Comparing base (fea0ea2) to head (f8f603b).

Files	Patch %	Lines
lib/datadog/ci/test_optimisation/component.rb	75.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #196 +/- ## ======================================= Coverage 98.88% 98.88% ======================================= Files 231 231 Lines 10359 10368 +9 Branches 473 475 +2 ======================================= + Hits 10243 10252 +9 Misses 116 116 ```

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