Getting rid of direct cross-project dependencies to avoid gradle warnings

[masseyke]

This commit avoids gradle warnings when running ./gradlew :qa:kerberos:compileJava. The :qa:kerberos project
had been directly pulling in the itest.runtimeClasspath from the storm and hadoop-mr projects, which is not allowed
in gradle 8.

[masseyke]

Here's an example of the warning I had been getting before this change:

Resolution of the configuration :elasticsearch-hadoop-mr:itestRuntimeClasspath was attempted from a context different than the project context. Have a look at the documentation to understand why this is a problem and how it can be resolved. This behaviour has been deprecated and is scheduled to be removed in Gradle 8.0. See https://docs.gradle.org/7.3/userguide/viewing_debugging_dependencies.html#sub:resolving-unsafe-configuration-resolution-errors for more details.
Resolution of the configuration :elasticsearch-storm:itestRuntimeClasspath was attempted from a context different than the project context. Have a look at the documentation to understand why this is a problem and how it can be resolved. This behaviour has been deprecated and is scheduled to be removed in Gradle 8.0. See https://docs.gradle.org/7.3/userguide/viewing_debugging_dependencies.html#sub:resolving-unsafe-configuration-resolution-errors for more details.

FAILURE: Build failed with an exception.

* What went wrong:
Deprecated Gradle features were used in this build, making it incompatible with Gradle 8.0```

[jakelandis]

Changes look good. I think it can be simplified a little by declaring the configuration and artifact in org.elasticsearch.hadoop.gradle.BuildPlugin#createItestTask

        Configuration itestJarConfig = project.getConfigurations().maybeCreate("itestJarConfig")
        itestJarConfig.canBeConsumed = Boolean.TRUE
        itestJarConfig.canBeResolved = Boolean.FALSE
        project.getArtifacts().add(itestJarConfig.getName(), itestJar)

just after the declaration or configuration of itestJar

[jakelandis]

LGTM

[masseyke]

Closes #1812