Bug: GraalVM list missing macos java8 artifact

[justhecuke]

Bug report
Recent releases of GraalVM CE do not have a macos version for java8 due to maintenance issues. The most recent release is 21.0.0.2 (https://github.com/graalvm/graalvm-ce-builds/releases/tag/vm-21.0.0.2) but it appears sdkman does not track that older release and, instead, has dropped it.

As of now, despite GraalVM CE having a macos java8 version, sdkman has no ability to allow macos users to use the java8 version since the recent uploads of GraalVM seem to have overwritten or hidden the older java8 release for macos.

To reproduce
Using a mac,
sdk list java

Notice how there is no .r8 version for GraalVM.

System info

SDKMAN 5.12.2