osbuild: update schema and config documentation

The `koji-osbuild` Hub schema has been relaxed a bit in the latest
release (v11). Adjust the schema in Pungi to reflect changes in
`koji-osbuild`.

For more information on the changes in `koji-osbuild`, see:
https://github.com/osbuild/koji-osbuild/pull/108

Signed-off-by: Tomáš Hozza <thozza@redhat.com>
(cherry picked from commit ef6d40dce4)

doc/configuration.rst

@@ -1641,13 +1641,13 @@ OSBuild Composer for building images
         * ``tenant_id`` -- Azure tenant ID to upload the image to
         * ``subscription_id`` -- Azure subscription ID to upload the image to
         * ``resource_group`` -- Azure resource group to upload the image to
-        * ``location`` -- Azure location to upload the image to
+        * ``location`` -- Azure location of the resource group (optional)
         * ``image_name`` -- Image name of the uploaded Azure image (optional)
 
       * **GCP upload options** -- upload to Google Cloud Platform.
 
         * ``region`` -- GCP region to upload the image to
-        * ``bucket`` -- GCP bucket to upload the image to
+        * ``bucket`` -- GCP bucket to upload the image to (optional)
         * ``share_with_accounts`` -- list of GCP accounts to share the image
           with
         * ``image_name`` -- Image name of the uploaded GCP image (optional)

pungi/checks.py

@@ -1229,7 +1229,10 @@ def make_schema():
                                 "ostree_ref": {"type": "string"},
                                 "ostree_parent": {"type": "string"},
                                 "upload_options": {
-                                    "oneOf": [
+                                    # this should be really 'oneOf', but the minimal
+                                    # required properties in AWSEC2 and GCP options
+                                    # overlap.
+                                    "anyOf": [
                                         # AWSEC2UploadOptions
                                         {
                                             "type": "object",
@@ -1268,7 +1271,6 @@ def make_schema():
                                                 "tenant_id",
                                                 "subscription_id",
                                                 "resource_group",
-                                                "location",
                                             ],
                                             "properties": {
                                                 "tenant_id": {"type": "string"},
@@ -1284,7 +1286,7 @@ def make_schema():
                                         {
                                             "type": "object",
                                             "additionalProperties": False,
-                                            "required": ["region", "bucket"],
+                                            "required": ["region"],
                                             "properties": {
                                                 "region": {"type": "string"},
                                                 "bucket": {"type": "string"},