Unable to run Bumblebench perf tests on jdk17

Ref: https://github.com/adoptium/bumblebench/pull/39#discussion_r3160345745

https://ci.adoptium.net/job/Grinder/17197/
```
11:41:12 [javac] Compiling 11 source files to /home/jenkins/workspace/Grinder/aqa-tests/perf/bumbleBench/bumblebench
11:41:12 [javac] error: invalid target release: 21
11:41:12 [javac] Usage: javac
11:41:12 [javac] use --help for a list of possible options
```

Adoptium runs these perf tests on jdk8,11,17

Start with the linked Grinder CI job and the Bumblebench build configuration that invokes javac, focusing on why it requests target release 21. Reproduce the compilation on the JDK 8, 11, and 17 environments mentioned in the issue, then verify that the performance tests compile and run on all three versions.

Written by the indexing model from the issue text.