[jest-worker] Don't crash when running node with flags disallowed in workers

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixes
 
 - `[babel-jest]` Add `process.version` chunk to the cache key ([#12122](https://github.com/facebook/jest/pull/12122))
+- `[jest-worker]` Stop explicitly passing `execArgv` ([#12128](https://github.com/facebook/jest/pull/12128))
 - `[website]` Fix the card front that looks overlapping part of the card back
 
 ### Chore & Maintenance

packages/jest-worker/src/workers/NodeThreadsWorker.ts

@@ -65,10 +65,6 @@ export default class ExperimentalWorker implements WorkerInterface {
         JEST_WORKER_ID: String(this._options.workerId + 1), // 0-indexed workerId, 1-indexed JEST_WORKER_ID
       },
       eval: false,
-      // Suppress --max_old_space_size flags while preserving others (like --harmony). See https://nodejs.org/api/worker_threads.html#new-workerfilename-options
-      execArgv: process.execArgv.filter(
-        v => !/^--(max_old_space_size|max-old-space-size)/.test(v),
-      ),
       // @ts-expect-error: added in newer versions
       resourceLimits: this._options.resourceLimits,
       stderr: true,

packages/jest-worker/src/workers/__tests__/NodeThreadsWorker.test.js

@@ -54,11 +54,10 @@ afterEach(() => {
 it('passes fork options down to worker_threads.Worker, adding the defaults', () => {
   const thread = require.resolve('../threadChild');
 
-  process.execArgv = ['--inspect', '-p'];
-
   // eslint-disable-next-line no-new
   new Worker({
     forkOptions: {
+      execArgv: ['--inspect', '-p'],
       execPath: 'hello',
     },
     maxRetries: 3,