Re-add resuse support

[ajbozarth]

Fixes #1161

nbresuse UI code was moved from core lab into an extension within the api, which was renamed and moved to the juoyter-server org. In order to keep the UI in Elyra we need to add it manually like we do git

Also fix some miswritten build lines for lsp support

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[lresende]

How easy would be to enable CPU usage tracking as well?

[lresende]

Also, do we need to enable the extension as we do with the others at https://github.com/elyra-ai/elyra/tree/master/etc/config/jupyter_server_config.d. It does seem that it gets enabled by the pip install, but just in case...

[ajbozarth]

Also, do we need to enable the extension as we do with the others at https://github.com/elyra-ai/elyra/tree/master/etc/config/jupyter_server_config.d. It does seem that it gets enabled by the pip install, but just in case...

I'll add it

How easy would be to enable CPU usage tracking as well?

I'll take a quick look and see how trivial or non-trivial this is, iirc it was non-trivial when it was in core

[ajbozarth]

@lresende added the config json file, but as for CPU tracking, it's not even in the lab extension currently. So it's non-trivial, but we could contribute it to the lab extension ourselves if we want to. It wouldn't be very difficult add, but It would still take a non-trivial amount of time

[lresende]

LGTM