HSEARCH-2470 Made sure overriding the default field type in MetadataP…

…rovidingFieldBridge works with projections.

Follow-up on 3278599, which was
incomplete.

Projections used to work in existing tests, but only because we
leveraged the "one-way field bridge" projections. Those are not
supported anymore, thus
org.hibernate.search.elasticsearch.test.ElasticsearchClassBridgeIT.testProjectionOfClassBridgeField()
started failing. Turning AgeBridge into a MetadataProvidingFieldBridge
and overriding the field type didn't work, though, and this commit aims
at fixing just that.

elasticsearch/src/main/java/org/hibernate/search/elasticsearch/util/impl/FieldHelper.java

@@ -131,6 +131,12 @@ private static ExtendedFieldType toExtendedFieldType(NumericEncodingType numeric
 	}
 
 	public static ExtendedFieldType getType(DocumentFieldMetadata fieldMetadata) {
+		// Always use user-provided type in priority
+		BridgeDefinedField overriddenField = fieldMetadata.getBridgeDefinedFields().get( fieldMetadata.getAbsoluteName() );
+		if ( overriddenField != null ) {
+			return getType( overriddenField );
+		}
+
 		PropertyMetadata propertyMetata = fieldMetadata.getSourceProperty();
 		Class<?> propertyClass = propertyMetata == null ? null : propertyMetata.getPropertyClass();
 		if ( propertyClass == null ) {