[GR-71636] [GR-64510] Fix resource tracing bugs with the JVMTI tracer.

[graalvmbot]

• GR-71636: Zip file tracing transiently fails because zipFileName is somehow null. ZipFile.getName should never return a null value, so this could be JVMTI weirdness. I could not reproduce it locally. I have added a null check to avoid the transient failures.
• GR-64510: If findResourceAsStream had module == null, we would pass 1 arg to ReflectionProcessor instead of the 2 expected args. I split up the handleResourceRegistration helpers to disambiguate when we need to pass 1 or 2 args.