lib: use validateString

refactor validation code using validate function

PR-URL: #59296
Reviewed-By: Ethan Arrowood <ethan@arrowood.dev>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Zeyu "Alex" Yang <himself65@outlook.com>
Reviewed-By: Filip Skokan <panva.ip@gmail.com>

Author: hotpineapple

lib/_http_client.js

@@ -78,6 +78,7 @@ const {
 const {
   validateInteger,
   validateBoolean,
+  validateString,
 } = require('internal/validators');
 const { getTimerDuration } = require('internal/timers');
 const {
@@ -218,12 +219,11 @@ function ClientRequest(input, options, cb) {
     delete optsWithoutSignal.signal;
   }
   let method = options.method;
-  const methodIsString = (typeof method === 'string');
-  if (method !== null && method !== undefined && !methodIsString) {
-    throw new ERR_INVALID_ARG_TYPE('options.method', 'string', method);
+  if (method != null) {
+    validateString(method, 'options.method');
   }
 
-  if (methodIsString && method) {
+  if (method) {
     if (!checkIsHttpToken(method)) {
       throw new ERR_INVALID_HTTP_TOKEN('Method', method);
     }