Add custom event template for report generation event

[andrewazores]

-core has a ReportRuleEvalEvent JFR event that that we should be able to capture from sidecar report generators. The best way to do this should be something similar to what we do in main Cryostat with the cryostat.jfc template. Using the Profiling template provided by the JDK in the base image of this project, extend the template by adding an event definition for the ReportRuleEvalEvent. That updated template definition should be added to this project somewhere under src/main/resources, and the build configuration updated so that the event template file is copied into the built OCI image in the correct filesystem location.

This can probably be accomplished with the Maven assembly plugin, as seen here:

https://github.com/cryostatio/cryostat/blob/main/src/assembly/dist.xml

https://github.com/cryostatio/cryostat/blob/7361dfee2ed32920171ca6219406c94086d5f436/pom.xml#L894

The setup will vary somewhat however since main Cryostat uses Jib to build the OCI image, but here in -reports we use the quarkus docker image build plugin.

cryostat-reports/pom.xml

Line 45 in 3237998

<artifactId>quarkus-container-image-docker</artifactId>