[depre] Deprecate YamlToAttributeDoctrineMappingRector

[TomasVotruba]

YamlToAttributeDoctrineMappingRector covers only a fraction of YAML mapping features. Anything beyond the basic cases silently produces incomplete or wrong attributes - e.g. missing nullable, dropped cascade/fetch options, lost lifecycle callbacks and custom types.

YAML mapping is project specific by nature, so a custom rule tailored to the actual mapping is a safer path than a generic half-covering rule.

What the rule does now

final class YamlToAttributeDoctrineMappingRector extends AbstractRector implements DeprecatedInterface
{
    public function refactor(Node $node): ?Node
    {
        throw new ShouldNotHappenException(sprintf(
            '"%s" is deprecated and should not be used anymore. Remove it from your config files.',
            self::class,
        ));
    }
}

Removed services

The rule was the only consumer of these, so they go with it:

• 20 classes in rules/CodeQuality/AttributeTransformer/
• EntityMappingResolver, ValueObject/EntityMapping
• Contract/ClassAttributeTransformerInterface, Contract/PropertyAttributeTransformerInterface
• orphaned helpers: Helper/NodeValueNormalizer, NodeFactory/AttributeFactory, Utils/CaseStringHelper

BC

DoctrineSetList::YAML_TO_ANNOTATIONS and its config file are kept, the config is now empty. Existing configs referencing the set keep loading.