add `--unsetannotation` option to `podman build`

[performantdata]

Feature request description

Add an --unsetannotation option, analogous to --unsetlabel, to podman build. Currently, there is no way to remove an annotation that is inherited from the parent image.

[Luap99]

This must be implement in buildah first so moving it there

[flouthoc]

Created a PR #6195