fix: Add mongo heartbeatEnabled param to tracer entrypoint (#5912)

Co-authored-by: Jean Cornic <jean.cornic@gmail.com>

Author: BridgeAR

index.d.ts

@@ -1820,6 +1820,13 @@ declare namespace tracer {
      * [mongodb-core](https://github.com/mongodb-js/mongodb-core) module.
      */
     interface mongodb_core extends Instrumentation {
+      /**
+       * Whether to enable mongo heartbeats spans.
+       *
+       * @default true
+       */
+      heartbeatEnabled?: boolean;
+
       /**
        * Whether to include the query contents in the resource name.
        */