Auto merge of #22244 - georgeroman:response_statustext_default_change, r=jdm

Change Response's statusText default value from 'Ok' to an empty string

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Closes #22238

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components/script/dom/webidls/Response.webidl

@@ -27,7 +27,7 @@ Response implements Body;
 
 dictionary ResponseInit {
   unsigned short status = 200;
-  ByteString statusText = "OK";
+  ByteString statusText = "";
   HeadersInit headers;
 };