@jwt_required does not work with the OPTIONS method

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Hello,

Thanks for the great work !

With the OPTIONS HTTP method, a confusing error message is raised, stating that @jwt_required() was not called, although it was called:

"You must call @jwt_required() or verify_jwt_in_request() "

Here is a way to reproduce the issue :

from flask import Flask, jsonify
from flask_jwt_extended import get_jwt_identity, jwt_required, JWTManager

app = Flask(__name__)
app.config["JWT_SECRET_KEY"] = "super-secret"
jwt = JWTManager(app)

@app.route("/", methods=["GET", "OPTIONS"])
@jwt_required(optional=True)
def protected():
    current_user = get_jwt_identity()
    return "hello", 200


if __name__ == "__main__":
    app.run()

$ curl -X OPTIONS http://0.0.0.0:5000/ -i 
HTTP/1.0 500 INTERNAL SERVER ERROR
Content-Type: text/html; charset=utf-8
Content-Length: 290
Server: Werkzeug/2.0.2 Python/3.7.11
Date: Wed, 13 Apr 2022 07:55:36 GMT

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<title>500 Internal Server Error</title>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.</p>

2022-04-13 09:55:36,725] ERROR in app: Exception on / [OPTIONS]
Traceback (most recent call last):
  File "/***/venv/lib/python3.7/site-packages/flask/app.py", line 2073, in wsgi_app
    response = self.full_dispatch_request()
  File "/***/venv/lib/python3.7/site-packages/flask/app.py", line 1518, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/***/venv/lib/python3.7/site-packages/flask/app.py", line 1516, in full_dispatch_request
    rv = self.dispatch_request()
  File "/***/venv/lib/python3.7/site-packages/flask/app.py", line 1502, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
  File "/***/venv/lib/python3.7/site-packages/flask_jwt_extended/view_decorators.py", line 127, in decorator
    return current_app.ensure_sync(fn)(*args, **kwargs)
  File "test_app.py", line 11, in protected
    current_user = get_jwt_identity()
  File "/***/venv/lib/python3.7/site-packages/flask_jwt_extended/utils.py", line 58, in get_jwt_identity
    return get_jwt().get(config.identity_claim_key, None)
  File "/***/venv/lib/python3.7/site-packages/flask_jwt_extended/utils.py", line 25, in get_jwt
    "You must call `@jwt_required()` or `verify_jwt_in_request()` "
RuntimeError: You must call `@jwt_required()` or `verify_jwt_in_request()` before using this method
127.0.0.1 - - [13/Apr/2022 09:55:36] "OPTIONS / HTTP/1.1" 500 -

Start by reproducing the OPTIONS request from the issue, then inspect flask_jwt_extended/view_decorators.py and flask_jwt_extended/utils.py at the traceback locations. Use test_app.py as the minimal example and add or run coverage for an OPTIONS request with @jwt_required(optional=True). Done means the request no longer raises the shown RuntimeError and the expected response is preserved.

Written by the indexing model from the issue text.

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