Fix OIDC Security event fired before runtime config ready in Arc

[michalvavrik]

I have app here https://github.com/quarkus-qe/quarkus-test-suite/blob/main/security/oidc-client-mutual-tls/src/test/java/io/quarkus/ts/security/oidcclient/mtls/IncorrectKsFileTypeOidcMtlsIT.java which shows me that this code can be run before runtime config mappings are ready to be accessible from CDI as beans.

21:49:56,271 INFO  [app] Caused by: [CIRCULAR REFERENCE: io.smallrye.mutiny.CompositeException: Multiple exceptions caught:
21:49:56,271 INFO  [app] 	[Exception 0] java.lang.RuntimeException: OIDC Server is not available
21:49:56,271 INFO  [app] 	[Exception 1] java.lang.NullPointerException: Cannot invoke "io.quarkus.security.runtime.SecurityConfig.events()" because the return value of "io.quarkus.arc.InstanceHandle.get()" is null]

Following workaround fixed issue for me. I don't think we can or should delay execution of this code in any way. I'll suggest to use QE test as test coverage for this for now, because I'm busy ATM.

[quarkus-bot]

✔️ 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.