Oryx - Clean up and shrink size

[samruddhikhandale]

With this cleanup, the size of the docker layer for the oryx feature reduced from 2.6 GB to 205 MB

Before these changes

After

[joshspicer]

Re: the oryx/jammy test missing libssl:

I spent (too much) time debugging this in the dotnet feature a month or so ago. I left some comments in the script that might be useful

https://github.com/devcontainers/features/blob/main/src/dotnet/install.sh#L328

[samruddhikhandale]

Re: the oryx/jammy test missing libssl:

Even with installed libssl packages, the oryx build and oryx prep cmd fails. It looks like a upstream oryx issue. I have asked them about it in chat if they are aware, else I'll create issues on oryx and this repo for tracking.

We are realizing this 🐛 now because I added oryx prep in the test.sh in this PR.

[samruddhikhandale]

It looks like a upstream oryx issue. I have asked them about it in chat if they are aware.

Spoke with the team, oryx is only currently supported ubuntu focal scm based build image

[joshspicer]

Chatted offline.

After adding a warning in the oryx/install.sh noting no support for jammy, this is good to override merge with the failing oryx jammy test.

We can leave it as another action item for devcontainers/cli#139 :)