RESTEasy service loader file parser doesn't account for comments

RESTEasy includes its own parser of service loader files (in the RegisterBuiltin class). That parser doesn't account for comments, even though those are legal (see https://docs.oracle.com/javase/9/docs/api/java/util/ServiceLoader.html). That makes for some interesting error messages when using e.g. RESTEasy's support for MicroProfile Context Propagation, because that file does use comments: https://github.com/resteasy/resteasy-microprofile/blob/main/context-propagation/src/main/resources/META-INF/services/jakarta.ws.rs.ext.Providers