Previously, the `OSTree` property in the Weldr API `ComposeRequest`
struct was not a pointer to the `ostree.ImageOptions` type. As a result,
it was initialized to an empty struct, even if not set in the client API
call.
As a result, the `OSTree` property in the `distro.ImageOptions` was
always not `nil`, when initializing the osbuild manifest. However, after
a change in `osbuild/images` [0], providing OSTree options for
non-OSTree image types is no longer considered valid. This caused a
failure to submit a new compose for any non-OSTree image type.
Change the `OSTree` property in Weldr `ComposeRequest` to be a pointer
and mark it as optional.
[0] https://github.com/osbuild/images/pull/1071
Signed-off-by: Tomáš Hozza <thozza@redhat.com>
1f590aa232