JRE path as environment variable

Hello, is there an environment variable to get the full JRE path for the extension? Specifically, when referencing from a devcontainer.json or settings.json file. Below is a path I'm talking about.

.vscode-server/extensions/redhat.java-1.40.0-linux-x64/jre/21.0.6-linux-x86_64/

For reference, I am creating a Dev Container for my team, which are using different OSs. The container will be using an older JRE version that some plugins won't support. I want to be able to reference the vscode-java JRE path in different settings without having to figure out the path after install.

For example, I am using Redhat's Community Server Connectors. In it, I have to define the java home rsp-ui.rsp.java.home. Currently, I pass the following if a user is on Windows

"rsp-ui.rsp.java.home": "/home/${localEnv:USERNAME}/.vscode-server/extensions/redhat.java-1.40.0-linux-x64/jre/21.0.6-linux-x86_64/"

but on Macs I have to do

"rsp-ui.rsp.java.home": "/home/${localEnv:USER}/.vscode-server/extensions/redhat.java-1.40.0-linux-arm64/jre/21.0.6-linux-aarch64/"

If there's a way to get that path without having to look it up, it'd be very useful.

Start by reviewing the extension's environment-variable or configuration entry points and how its JRE path is assembled. Check the devcontainer.json and settings.json use cases described in the issue, including Windows and macOS architectures. Done means a documented, cross-platform way to reference the extension's JRE path without hard-coding its installed version or directory.