Force close open connections to the ephemeral test branch when dropping

There shouldn't be any since we've closed the app first, but it was still reporting some.
I don't mind forcing it for this use case.

Author: CarsonF

test/utility/edgedb-setup.ts

@@ -18,7 +18,7 @@ export const ephemeralEdgeDB = async () => {
   await db.execute(`create schema branch ${branch} from ${main}`);
 
   const cleanup = async () => {
-    await db.execute(`drop branch ${branch}`);
+    await db.execute(`drop branch ${branch} force`);
     await db.close();
   };