change base image and update dependencies

[stefanotorresi]

Changes the base image so that we always use the same BCI everywhere, and fixes runtime issues with some libraries missing.
Also tar is in the base image now.

Sister PR in wanda coming up.

Fixes https://jira.suse.com/browse/TRNT-3457

[arbulu89]

Hey @stefanotorresi ,
Thank you.
I have put the env label to create the PR env and see if the community image is properly created and works.
Before merging, could we test if the changes work this time? (I didn't do it myself and here we are...).
Just replace this Dockerfile content in the OBS trento-web-image project. And later on check if the image is built properly in OBS but specially in IBS.

We should do this with both web and wanda.
Otherwise, I can do the test myself, it is not a big deal

[stefanotorresi]

this was already tested in Devel:SAP:trento (IBS) when we encountered the runtime issue during the release window, and the images are now practically identical (this is why I changed the base image repo from opensuse to bci).

[stefanotorresi]

superseded by #3232