[FIX] web, tests: increase navigate_to timeout

The qunit loading is now arroud 15 seconds, breaking sometimes because
of the 15 seconds timeout.

A quick and dirty fix increases the timeout to 20 (freeze time)

An deeper investigation is needed to speed up this page.
Pregeneration of assets bundle may help

closes odoo/odoo#99163

Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>

odoo/tests/common.py

@@ -1491,7 +1491,7 @@ which leads to stray network requests and inconsistencies."""))
 
     def navigate_to(self, url, wait_stop=False):
         self._logger.info('Navigating to: "%s"', url)
-        nav_result = self._websocket_request('Page.navigate', params={'url': url}, timeout=15.0)
+        nav_result = self._websocket_request('Page.navigate', params={'url': url}, timeout=20.0)
         self._logger.info("Navigation result: %s", nav_result)
         if wait_stop:
             frame_id = nav_result['frameId']