Bundler tests V2

[asvae]

Right now bundler tests are pretty hard to manage. They're implemented using docker, which I'm personally not sure how to look inside or whether it's possible at all.

• [ ] So we either need a guideline on how to debug and improve bundler tests or a switch of approach.
• [ ] We also need a documentation page where all technologies we support are neatly showcased and have a bind to bundler test (ideally you should be able to click on particular test and be redirected to CI page).

also see #3507, which was an inspiration for this issue

[asvae]

Right now we also have some warns for bundler tests. Not sure if we want to handle these in context of this effort.

[asvae]

I allowed to skip tests in e6069b649e818a45628bb5c1913c12fc3d843ecb.

They were incredibly hard to run and debug. We need a better system promtly.