[FIX] core: ensure werkzeug request/response json

closes odoo/odoo#33682

Signed-off-by: Pierre Masereel <pim@odoo.com>

odoo/tools/_monkeypatches.py

@@ -6,6 +6,9 @@ from shutil import copyfileobj
 _logger = logging.getLogger(__name__)
 
 from werkzeug.datastructures import FileStorage
+from werkzeug.wrappers import Request, Response
+
+from .json import scriptsafe
 
 try:
     from xlrd import xlsx
@@ -28,6 +31,8 @@ else:
 
 FileStorage.save = lambda self, dst, buffer_size=1<<20: copyfileobj(self.stream, dst, buffer_size)
 
+Request.json_module = Response.json_module = scriptsafe
+
 orig_literal_eval = ast.literal_eval
 
 def literal_eval(expr):