Fix URL parsing to respect node/chromium convention (facebook#50757)

Summary:
Pull Request resolved: facebook#50757

We received [this issue](facebook#50747) in OSS where the URL parsing logic does not respect node/chromium specs.

This can cause issue in usercode. This change fixes it

## Changelog:
[General][Fixed] - make sure that URLs are parsed following the node specs

Reviewed By: huntie

Differential Revision: D73101813

fbshipit-source-id: 36f1d23b3ad7882c16524843621d9ebbcc09b95d

Author: cipolleschi

packages/react-native/Libraries/Blob/URL.js

@@ -81,7 +81,19 @@ export class URL {
     let baseUrl = null;
     if (!base || validateBaseUrl(url)) {
       this._url = url;
-      if (!this._url.endsWith('/')) {
+      if (this._url.includes('#')) {
+        const split = this._url.split('#');
+        const beforeHash = split[0];
+        const website = beforeHash.split('://')[1];
+        if (!website.includes('/')) {
+          this._url = split.join('/#');
+        }
+      }
+
+      if (
+        !this._url.endsWith('/') &&
+        !(this._url.includes('?') || this._url.includes('#'))
+      ) {
         this._url += '/';
       }
     } else {