fix(NODE-4251): ensure internal clients dont promote

Author: durran

src/encrypter.ts

@@ -83,6 +83,9 @@ export class Encrypter {
 
       clonedOptions.minPoolSize = 0;
 
+      clonedOptions.promoteValues = false;
+      clonedOptions.promoteLongs = false;
+
       internalClient = new MongoClient(uri, clonedOptions);
       this[kInternalClient] = internalClient;