fix(child_process): add execArgv support to spawn()

doc/api/child_process.md

@@ -695,6 +695,7 @@ changes:
   * `env` {Object} Environment key-value pairs. **Default:** `process.env`.
   * `argv0` {string} Explicitly set the value of `argv[0]` sent to the child
     process. This will be set to `command` if not specified.
+  * `execArgv` {string\[]} List of string arguments passed to the executable.
   * `stdio` {Array|string} Child's stdio configuration (see
     [`options.stdio`][`stdio`]).
   * `detached` {boolean} Prepare child process to run independently of

lib/child_process.js

@@ -691,6 +691,13 @@ function normalizeSpawnArguments(file, args, options) {
     }
   }
 
+  // Handle execArgv - prepend to args if provided
+  if (options.execArgv != null) {
+    validateArray(options.execArgv, 'options.execArgv');
+    validateArgumentsNullCheck(options.execArgv, 'options.execArgv');
+    args = [...options.execArgv, ...args];
+  }
+
   if (typeof options.argv0 === 'string') {
     ArrayPrototypeUnshift(args, options.argv0);
   } else {
@@ -788,6 +795,7 @@ function abortChildProcess(child, killSignal, reason) {
  *   cwd?: string | URL;
  *   env?: Record<string, string>;
  *   argv0?: string;
+ *   execArgv?: string[];
  *   stdio?: Array | string;
  *   detached?: boolean;
  *   uid?: number;