OPTIONS Request on /openapi => infinite loading

[dobbidev]

Describe the bug
The bug is located in the following extension: quarkus-smallrye-openapi

When I call "http://localhost:8080/openapi" with the OPTIONS Method, it keeps loading like something freeze the request

Expected behavior
It should return an 200er and the allowed methods

To Reproduce
Steps to reproduce the behavior:

1. clone https://github.com/quarkusio/quarkus-quickstarts.git
2. go to openapi-swaggerui-quickstart
3. run it
4. call
   curl --request OPTIONS
   --url http://localhost:8080/openapi

Screenshots

Solution could be
In this class:
https://github.com/quarkusio/quarkus/blob/master/extensions/smallrye-openapi/runtime/src/main/java/io/quarkus/smallrye/openapi/runtime/OpenApiHandler.java

 if (event.request().method().equals(HttpMethod.OPTIONS)) {
            addCorsResponseHeaders(event.response());
            event.response().headers().set("Allow", ALLOWED_METHODS);
}

I think it miss the call next on the event

 if (event.request().method().equals(HttpMethod.OPTIONS)) {
            addCorsResponseHeaders(event.response());
            event.response().headers().set("Allow", ALLOWED_METHODS);
            event.next(); 
}

[quarkusbot]

/cc @EricWittmann, @MikeEdgar, @phillip-kruger

[gastaldi]

@Machareder that makes sense. Are you interested in providing a Pull-Request?

[dobbidev]

@gastaldi

#10612

I hope the Pull-Request is provided correctly