Support conda and virtual environments if a requirements file is present

[akchinSTC]

Add the ability to create a virtual environment of the appropriate type in each pipeline node if a requirements file or eqiv. is provided

[akchinSTC]

Related: https://github.com/elyra-ai/elyra/issues/1001

[goern]

Moin, we - @pacospace and @fridex - are happy to help here, managing system, toolchain and application (and I would consider a notebook an application) dependencies (esp in containers) is our business for quite some time now. Maybe learn from what we did with https://docs.openshift.com/container-platform/4.6/builds/understanding-image-builds.html#build-strategy-s2i_understanding-image-builds for general Python applications.

[akchinSTC]

@goern - Thank you so much for the offer of help (we definitely could use a few more hands). I plan on taking an hour or two tomorrow to look over all the material to generate some questions for you guys and see what our path moving forward will be.

[akchinSTC]

Will need to revisit this issue, give the change in the Anaconda Licensing and how that will affect this.

[pacospace]

We can join today the call with @fridex so we can discuss this issue and the other linked above, WDYT @akchinSTC? or next week if you have already too much for today. Let us know please :)

[pacospace]

@akchinSTC what are next steps for this issue? :)