Ensure all validation results use translatable strings except when created from throwables

Problem/Motivation

More or less everywhere we take an array of $messages as a method argument, we pass it not only not only TranslatableMarkup[], in practice, but also string[] this seem to happen most in in tests. The other case where we do this is when add validation results from exceptions.

We don't add want developers to create validation results that are not translatable. The only time where this should happen is when validation results are being create from throwable. in that case they won't be translatable.

Proposed resolution

We should make it easy to make it obvious that all validation results should translatable exception when created from exceptions

1. Add \Drupal\package_manager\Event\PreOperationStageEvent::addErrorFromThrowable
2. Add \Drupal\package_manager\ValidationResult::createErrorFromThrowable
3. Change `\Drupal\Tests\automatic_updates\Traits\ValidationTestTrait::createValidationResult` to use translatable strings
4. Replaces all places where we send untranslatable to \Drupal\package_manager\ValidationResult::createError or \Drupal\package_manager\ValidationResult::createWarning, \Drupal\package_manager\Event\PreOperationStageEvent::addError or \Drupal\package_manager\Event\StatusCheckEvent::addWarning
5. In places where we add validation results from throwable(exceptions mostly) use \Drupal\package_manager\Event\PreOperationStageEvent::addErrorFromThrowable

Remaining tasks

1,2,3 are done. 4 and 5 need to be done