chore(ci): build only images with ffmpeg included, simplify tags

[mudler]

Description

This PR simplifies images creations and reduces the number of ci jobs. We default by including ffmpeg and we do not split anymore images.

TODO:

• Update docs after release
• Update installer.sh after release

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

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[github-actions]

yamllint Failed

Show Output

::group::gallery/index.yaml
::warning file=gallery/index.yaml,line=21,col=6::21:6 [comments] missing starting space in comment
::warning file=gallery/index.yaml,line=39,col=6::39:6 [comments] missing starting space in comment
::warning file=gallery/index.yaml,line=57,col=6::57:6 [comments] missing starting space in comment
::error file=gallery/index.yaml,line=101,col=14::101:14 syntax error: found character '\t' that cannot start any token (syntax)
::endgroup::

Workflow: Yamllint GitHub Actions, Action: __karancode_yamllint-github-action, Lint: gallery