[fix][broker] Avoid Project access in broker test setup

[nodece]

Motivation

Broker tests configured NAR and JAR paths through rootProject.project(...) inside the test task action. That captures Gradle Project objects in the task configuration and breaks configuration cache for :pulsar-broker:test.

1 problem was found storing the configuration cache.
- Task `:pulsar-broker:test` of type `org.gradle.api.tasks.testing.Test`: cannot serialize object of type 'org.gradle.api.internal.project.DefaultProject', a subtype of 'org.gradle.api.Project', as these are not supported with the configuration cache.
  See https://docs.gradle.org/9.4.1/userguide/configuration_cache_requirements.html#config_cache:requirements:disallowed_types

Changes

• replace broker test cross-project task lookups with resolvable dependency configurations
• resolve required broker test NAR and JAR artifacts through resolvedArtifacts
• keep the existing test system properties while making the test task compatible with configuration cache

[lhotari]

Thank you!

[lhotari]

Please check this before merging:

  Gradle suite > Gradle test > org.apache.pulsar.functions.worker.PulsarFunctionMetadataStoreTest > setup FAILED
      java.lang.AssertionError: /home/runner/work/pulsar/pulsar/pulsar-io/data-generator/build/libs/pulsar-io-data-generator-4.3.0-SNAPSHOT.nar doesn't exist. expected [true] but found [false]

[nodece]

@lhotari Good catch, this issue has been fixed.