Start embedding the awscloud.AWS from osbuild/images in
osbuild-composer's version of awscloud.AWS. The idea is to remove all
methods from osbuild-composer implementation, which are used for
uploading and registering images in AWS. The rest that it related to
service maintenance or to running secure instances, will be kept in
osbuild-composer, since these are specific to the project.
Signed-off-by: Tomáš Hozza <thozza@redhat.com>
