Fix excessive requests to Google on initialisation (#3218)

### Purpose 
When a user logs in with google, requests for the Avatar occasionally
fail. After investigation, the issue seems to be caused by Google's API
enforcing stricter restrictions on the Referer header. By adding the
directive referrerpolicy="no-referrer", these restrictions can be
bypassed.
Source:
https://stackoverflow.com/questions/40570117/http403-forbidden-error-when-trying-to-load-img-src-with-google-profile-pic

### Changes
When requesting a Google avatar, add referrerpolicy="no-referrer".

---------

Co-authored-by: Texera <[email protected]>
Co-authored-by: shenghao fu <[email protected]>
Co-authored-by: GspikeHalo <[email protected]>

core/gui/src/app/common/service/user/user.service.ts

@@ -125,7 +125,7 @@ export class UserService {
 
   private fetchBlob(url: string): Observable<Blob> {
     return new Observable(observer => {
-      fetch(url)
+      fetch(url, { referrerPolicy: "no-referrer" })
         .then(response => {
           if (!response.ok) {
             throw new Error(`HTTP error! status: ${response.status}`);