distro/rhel85: always install docs in the rpm stage

When we firstly introduced the v2 manifests, we excluded docs from all rpm
stages because it doesn't make sense to include docs in edge images.

However, when we ported the other image types to v2, we left the flag on.
The side effect of --excludedocs is that we no longer install man pages into
the image. This the default behaviour of rpm and can be seen here:
b88f43b9a3/macros.in (L555)

This is actually quite a major regression in non-edge images, thus this commit
reverts this setting. It would be great to have the option not to install
docs in some rpm stages but as this is a difficult topic and we're already
past the deadline, we will consider this in the future.

Signed-off-by: Ondřej Budai <ondrej@budai.cz>

internal/distro/rhel85/stage_options.go

@@ -32,10 +32,6 @@ func rpmStageOptions(repos []rpmmd.RepoConfig) *osbuild.RPMStageOptions {
 
 	return &osbuild.RPMStageOptions{
 		GPGKeys: gpgKeys,
-		Exclude: &osbuild.Exclude{
-			// NOTE: Make configurable?
-			Docs: true,
-		},
 	}
 }