Migrate Elyra extensions to support JupyterLab 4.x

[lresende]

What changes were proposed in this pull request?

Migrate Elyra extensions to support JupyterLab 4.x

Fixes #3137

How was this pull request tested?

Building and running on JupyterLab 4.x

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[kevin-bates]

I'm assuming the build failures are a temporary hurdle. Thanks for dealing with the @lresende!

[lresende]

I have made some progress here, but I would appreciate if I could get some help on the UI pieces, in particular on UI-components... @marthacryan @karlaspuldaro @ajbozarth and others feel free to send prs to this branch as time permits... I completely understand if you are not able to.

[karlaspuldaro]

This line is causing build failure, maybe it's best to use a stable version of yarn