[v22.x backport] worker: make Worker async disposable

doc/api/worker_threads.md

@@ -1846,6 +1846,14 @@ Calling `unref()` on a worker allows the thread to exit if this is the only
 active handle in the event system. If the worker is already `unref()`ed calling
 `unref()` again has no effect.
 
+### `worker[Symbol.asyncDispose]()`
+
+<!-- YAML
+added: REPLACEME
+-->
+
+Alias for [`worker.terminate()`][].
+
 ## Notes
 
 ### Synchronous blocking of stdio

lib/internal/worker.js

@@ -58,7 +58,7 @@ const {
 const { createMainThreadPort, destroyMainThreadPort } = require('internal/worker/messaging');
 const { deserializeError } = require('internal/error_serdes');
 const { fileURLToPath, isURL, pathToFileURL } = require('internal/url');
-const { kEmptyObject } = require('internal/util');
+const { kEmptyObject, SymbolAsyncDispose } = require('internal/util');
 const { validateArray, validateString } = require('internal/validators');
 const {
   throwIfBuildingSnapshot,
@@ -406,6 +406,10 @@ class Worker extends EventEmitter {
     });
   }
 
+  async [SymbolAsyncDispose]() {
+    await this.terminate();
+  }
+
   ref() {
     if (this[kHandle] === null) return;
 

test/parallel/test-worker-dispose.mjs

@@ -0,0 +1,9 @@
+import * as common from '../common/index.mjs';
+import { Worker } from 'node:worker_threads';
+
+{
+  // Verifies that the worker is async disposable
+  const worker = new Worker('for(;;) {}', { eval: true });
+  worker.on('exit', common.mustCall());
+  await worker[Symbol.asyncDispose]();
+}