VSCode extension tries to download kubectl and tkn

[pittar]

When deploying this extension into Eclipse Che / OpenShift Dev Spaces, it would seem it tries to download kubectl (and I believe tkn) CLIs, even though they are already present in the UDI image.

This is causing a problem in semi-restricted networks where the workspace pod can't connect to most external sources to download these CLIs.

Ideally, the plugin should check for a compatible version of these tools before attempting to download them.