[Image Update] Request to support multiple versions of .NET and Java

Thank you for filing this request! Please take a few minutes to fill out this template so that we can better understand the request.

#### Which image would you like to change?
Current one
#### What changes are you requesting?
We had an issue with the Functions team where we wanted to open Functions projects from Azure Portal -> /azure but the package versions for .NET & Java seemed to be a blocker. Some of the function apps rely on .NET 9 and .NET 10 and I know Cloudshell does not support multiple versions for security concerns. Last time we checked, JS and Python seemed to be less of an issue. Can we discuss potential solutions for this?
#### What scenario are these changes enabling?
Azure Functions -> vscode.dev/azure
#### By how much does this change change the image size?
Not sure :)

Beginnen Sie mit der Überprüfung des aktuellen Cloud Shell-Images und der im Request genannten Einstiegspunkte Azure Portal -> /azure und vscode.dev/azure. Klären Sie, wie .NET 9, .NET 10 und mehrere Java-Versionen innerhalb der angegebenen Sicherheitsanforderungen nebeneinander bestehen sollen; für den Abschluss ist eine abgestimmte Lösung für das Azure Functions-Szenario erforderlich.

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