Remove dependance on legacy features

[chrmarti]

Removing vscode-dev-containers from devcontainers/cli requires a solution for legacy features that are not replaced with new features yet (fish, maven, gradle, homebrew, jupyterlab).

[eitsupi]

@chrmarti Note that fish and homebrew are already published as new Features.
https://github.com/meaningful-ooo/devcontainer-features

[alexdima]

• the new java feature has options for maven and gradle
• the new python feature has an option for jupyterlab