Spring Security Simplify MvcRequestMatcher construction

Constructing an MvcRequestMatcher can be confusing since it's unclear where to obtain a HandlerMappingIntrospector from.

Spring Security could publish a prototype bean like so to make that easier:

@Bean 
@Scope("prototype")
MvcRequestMatcher.Builder mvcRequestMatcherBuilder(HandlerMappingIntrospector introspector) {
    return new MvcRequestMatcher.Builder(introspector);
}

Comment From: jzheaux

Due to https://github.com/spring-projects/spring-security/issues/13794, this has been reopened to give us more time to assess the right solution.

Comment From: jzheaux

I'm closing this ticket since it is superceded by AntPathRequestMatcher's and MvcRequestMatcher's removal.

Please use PathPatternRequestMatcher instead.