feat: add MultiSchema to mysql capabilities

Author: FGoessler

psl/psl-core/src/builtin_connectors/mysql_datamodel_connector.rs

@@ -50,6 +50,7 @@ pub const CAPABILITIES: ConnectorCapabilities = enumflags2::make_bitflags!(Conne
     NativeFullTextSearch |
     NativeFullTextSearchWithIndex |
     MultipleFullTextAttributesPerModel |
+    MultiSchema |
     ImplicitManyToManyRelation |
     DecimalType |
     OrderByNullsFirstLast |