Update eslint fixtures (#32589)

Extracting portions of #32416 for easier review.

This PR lightly updates the build scripts for the eslint fixtures.

Co-authored-by: michael faith <michaelfaith@users.noreply.github.com>
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/32589).
* #32592
* #32591
* #32590
* __->__ #32589
* #32588

---------

Co-authored-by: michael faith <michaelfaith@users.noreply.github.com>

Author: poteto

fixtures/eslint-v6/build.mjs

@@ -1,12 +1,13 @@
 #!/usr/bin/env node
 
-import {exec} from 'node:child_process';
+import {execSync} from 'node:child_process';
 import {dirname, resolve} from 'node:path';
 import {fileURLToPath} from 'node:url';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 
-exec('yarn build -r stable eslint-plugin-react-hooks', {
+execSync('yarn build -r stable eslint-plugin-react-hooks', {
   cwd: resolve(__dirname, '..', '..'),
+  stdio: 'inherit',
 });

fixtures/eslint-v7/build.mjs

@@ -1,12 +1,13 @@
 #!/usr/bin/env node
 
-import {exec} from 'node:child_process';
+import {execSync} from 'node:child_process';
 import {dirname, resolve} from 'node:path';
 import {fileURLToPath} from 'node:url';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 
-exec('yarn build -r stable eslint-plugin-react-hooks', {
+execSync('yarn build -r stable eslint-plugin-react-hooks', {
   cwd: resolve(__dirname, '..', '..'),
+  stdio: 'inherit',
 });

fixtures/eslint-v8/build.mjs

@@ -1,12 +1,13 @@
 #!/usr/bin/env node
 
-import {exec} from 'node:child_process';
+import {execSync} from 'node:child_process';
 import {dirname, resolve} from 'node:path';
 import {fileURLToPath} from 'node:url';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 
-exec('yarn build -r stable eslint-plugin-react-hooks', {
+execSync('yarn build -r stable eslint-plugin-react-hooks', {
   cwd: resolve(__dirname, '..', '..'),
+  stdio: 'inherit',
 });

fixtures/eslint-v9/build.mjs

@@ -1,12 +1,13 @@
 #!/usr/bin/env node
 
-import {exec} from 'node:child_process';
+import {execSync} from 'node:child_process';
 import {dirname, resolve} from 'node:path';
 import {fileURLToPath} from 'node:url';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 
-exec('yarn build -r stable eslint-plugin-react-hooks', {
+execSync('yarn build -r stable eslint-plugin-react-hooks', {
   cwd: resolve(__dirname, '..', '..'),
+  stdio: 'inherit',
 });