Show the use of overlays handled from Jupyterlab and the release of different images matching step of an Elyra pipeline

[pacospace]

Is your feature request related to a problem? Please describe.

As a Data Scientist,

I want to run an Elyra Pipeline,
with different dependencies for my notebooks.
Hence I would like to use overlays and create images for each step that satisfy each specific notebook requirements

The result should be a demo on Op1st.

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
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Additional context
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/kind feature
/sig user-experience

[pacospace]

Closed-by: #68