Support specifying upload options for image builds

The upload options are expected to be provided as a JSON file. The same
options will be used for all image type and architecture combinations,
similarly as it is done for ostree options.

Extend unit tests to cover the newly added functionality.

plugins/builder/osbuild.py

@@ -116,6 +116,7 @@ class ImageRequest:
         self.image_type = image_type
         self.repositories = repos
         self.ostree: Optional[OSTreeOptions] = None
+        self.upload_options: Optional[Dict] = None
 
     def as_dict(self):
         arch = self.architecture
@@ -128,6 +129,8 @@ class ImageRequest:
         }
         if self.ostree:
             res["ostree"] = self.ostree.as_dict(self.architecture)
+        if self.upload_options:
+            res["upload_options"] = self.upload_options
 
         return res
 
@@ -688,6 +691,12 @@ class OSBuildImage(BaseTaskHandler):
         for ireq in ireqs:
             ireq.ostree = ostree
 
+        # Cloud upload options
+        upload_options = opts.get("upload_options")
+        if upload_options:
+            for ireq in ireqs:
+                ireq.upload_options = upload_options
+
         self.logger.debug("Creating compose: %s (%s)\n  koji: %s\n  images: %s",
                           nvr, distro, self.koji_url,
                           str([i.as_dict() for i in ireqs]))