[Turbopack] Perf improvement new backend aggregation (#71356)

### What?

A lot of small performance improvements for the task aggregation in the
new backend

Author: sokra

packages/next/src/build/swc/generated-native.d.ts

@@ -273,10 +273,6 @@ export interface StackFrame {
   column?: number
   methodName?: string
 }
-export function projectGetSourceMap(
-  project: { __napiType: 'Project' },
-  filePath: string
-): Promise<string | null>
 export function projectTraceSource(
   project: { __napiType: 'Project' },
   frame: StackFrame
@@ -285,6 +281,10 @@ export function projectGetSourceForAsset(
   project: { __napiType: 'Project' },
   filePath: string
 ): Promise<string | null>
+export function projectGetSourceMap(
+  project: { __napiType: 'Project' },
+  filePath: string
+): Promise<string | null>
 /** Runs exit handlers for the project registered using the [`ExitHandler`] API. */
 export function projectOnExit(project: { __napiType: 'Project' }): Promise<void>
 export function rootTaskDispose(rootTask: { __napiType: 'RootTask' }): void

turbopack/crates/turbo-tasks-backend/src/backend/mod.rs

@@ -405,9 +405,7 @@ impl TurboTasksBackendInner {
                 drop(task);
                 if !task_ids_to_schedule.is_empty() {
                     let mut queue = AggregationUpdateQueue::new();
-                    queue.push(AggregationUpdateJob::FindAndScheduleDirty {
-                        task_ids: task_ids_to_schedule,
-                    });
+                    queue.extend_find_and_schedule_dirty(task_ids_to_schedule);
                     queue.execute(&mut ctx);
                 }