Gradle config cache: jmx-metrics

[trask]

Fixes ./gradlew :instrumentation:jmx-metrics:library:test --configuration-cache:

* What went wrong:
Configuration cache problems found in this build.

2 problems were found storing the configuration cache.
- Task `:instrumentation:jmx-metrics:library:test` of type `org.gradle.api.tasks.testing.Test`: cannot serialize object of type 'com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar', a subtype of 'org.gradle.api.Task', as these are not supported with the configuration cache.
  See https://docs.gradle.org/9.2.0/userguide/configuration_cache_requirements.html#config_cache:requirements:task_access
- Task `:instrumentation:jmx-metrics:library:test` of type `org.gradle.api.tasks.testing.Test`: cannot serialize object of type 'org.gradle.api.tasks.bundling.War', a subtype of 'org.gradle.api.Task', as these are not supported with the configuration cache.
  See https://docs.gradle.org/9.2.0/userguide/configuration_cache_requirements.html#config_cache:requirements:task_access