Revert "Merge branch 'fix_tag_special_chars' into 'main'"

This reverts merge request !84 (merged)

This MR breaks multiple things:

• it convert '.' to '-' leading to docker image tag being different than git tag as a consequence it break the operator-template.yml that still try to download an image with '.' formatted tag see: registry.gitlab.com/sylva-projects/sylva-elements/sylva-units-operator:0-1-2
• also it will require to change all reference to docker tag to use - instead of . which is not very common and will probably break renovate

I suggest to revert this MR and address the very specific case of the +rke2 tag in the corresponding repo