OpenAPI: skip adding method references to model without OperationFilter

[MikeEdgar]

Currently, when the OpenAPI OperationFilter is not used (by disabling several configuration properties to auto-add API information), the scanner will still set x-quarkus-openapi-method-ref extensions in the model for each API operation. This change prevents adding the method-refs when the OperationFilter is not part of the build process.

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 25432f0.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.

---

Flaky tests - Develocity

⚙️ JVM Tests - JDK 21

📦 extensions/smallrye-openapi/deployment

❌ io.quarkus.smallrye.openapi.test.jaxrs.OpenApiDefaultPathTestCase.testOpenApiPathAccessResource - History

• 1 expectation failed. Expected header "Content-Type" was not "application/yaml;charset=UTF-8", was "application/json; charset=utf-8". Headers are: content-type=application/json; charset=utf-8 content-length=3055 - java.lang.AssertionError

java.lang.AssertionError: 
1 expectation failed.
Expected header "Content-Type" was not "application/yaml;charset=UTF-8", was "application/json; charset=utf-8". Headers are:
content-type=application/json; charset=utf-8
content-length=3055

	at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)

[MikeEdgar]

Another victim of #50563