Update the DEFAULT_CODEC_REGISTRY order

Ensure that KotlinCodecProvider is used to handle any kotlin
types first, then fall back to any native java codecs.

For non kotlin users this will be a NOOP as the actual kotlin codec
providers won't be on the class path

JAVA-5928

Author: rozza

driver-core/src/main/com/mongodb/MongoClientSettings.java

@@ -83,10 +83,10 @@ public final class MongoClientSettings {
                     new Jsr310CodecProvider(),
                     new JsonObjectCodecProvider(),
                     new BsonCodecProvider(),
-                    new EnumCodecProvider(),
                     new ExpressionCodecProvider(),
                     new Jep395RecordCodecProvider(),
-                    new KotlinCodecProvider()));
+                    new KotlinCodecProvider(),
+                    new EnumCodecProvider()));
 
     private final ReadPreference readPreference;
     private final WriteConcern writeConcern;