[2.0.0-beta1] Reduce code complexity

Following 📌 [2.0.0-beta1] Sources must add dependencies to config entities Needs review

we also need to deal with:

ComponentElementBuilder::calculateComponentDependencies(): Cyclomatic Complexity of 10. The configured cyclomatic complexity threshold is 10.

i did a pass :)
please review

To test.

ComponentFormatterBase::getComponentSourceContexts()

Test a formatter with a context-related source (field formatter)

ComponentStyle::addAjaxGroupTitleOption()

Was removed by 📌 [2.0.0-beta1] Do we take care of the big object in views config? Fixed

EntityFieldSourceDeriverBase::getEntityFieldsMetadata()

EntityFieldSourceDeriverBase::getDerivativeDefinitions()

Test a formatter with a "Data from field" source

SourcePluginManager::getNativeDefinitionsForPropType()

No dedicated test

I have this:

Line src/SourcePluginManager.php
------ ---------------------------------------------------------------------
150 PHPDoc tag @param for parameter $tag_filter with type array|null is not subtype of native type array.

done :)

Automatically closed - issue fixed for 2 weeks with no activity.