fix: connection Reuse is broken in a Lambda environment: (#4804)

* Connection Reuse is broken in a Lambda environment:
- Fix issue find metadata does not exist with webpack

* Fix typing and missing bracket

Author: phong-innomizetech

src/connection/Connection.ts

@@ -481,8 +481,12 @@ export class Connection {
      */
     protected findMetadata(target: Function|EntitySchema<any>|string): EntityMetadata|undefined {
         return this.entityMetadatas.find(metadata => {
-            if (metadata.target === target)
+            if (typeof metadata.target === "function" && typeof target === "function" && metadata.target.name === target.name) {
                 return true;
+            }
+            if (metadata.target === target) {
+                return true;
+            }
             if (target instanceof EntitySchema) {
                 return metadata.name === target.options.name;
             }