[Tests] Remove tests to fix build with JDK<17 (#124702)

This PR removes test-cluster tests added in #124661  Subproject
`:test:test-cluster` uses Java 17 source API so it is compiled with this
version. If the tests are run with Java <16 they would fail. We want to
keep the test-cluster code with Java 17 and the value of these tests are
low so they have been removed. They will be kept on the newer branches.

Author: jozala

test/test-clusters/build.gradle

@@ -8,10 +8,6 @@ dependencies {
   shadow "org.apache.logging.log4j:log4j-api:${versions.log4j}"
 
   implementation files("$rootDir/build-tools/reaper/build/libs/reaper.jar")
-
-  testImplementation "junit:junit:${versions.junit}"
-  testImplementation "org.hamcrest:hamcrest:${versions.hamcrest}"
-  testImplementation "org.apache.logging.log4j:log4j-core:${versions.log4j}"
 }
 
 // We use updated APIs here and since this project is only used for REST testing it's ok to run with > Java 8