image: only filter out images when ImageBuilder is used

image: only filter out images when ImageBuilder is used

Currently, we are filtering out images if DEFAULT:=n or BROKEN:=y are set,
so if you are building from scratch and want to build custom images that
are stripped down to fit, you must edit the image recipe or its just
filtered out.

So, to allow this behaviour when building from scratch as we can assume
that person doing that knows what they are attempting to do lets just limit
the filtering to ImageBuilder.

Fixes: f060615a78e5 ("image: respect DEFAULT and BROKEN when Default profile is selected")
Signed-off-by: Robert Marko <robimarko@gmail.com>