Fix storage config (#1854)

## Problem

There is collision between
#1848 and
#1840 where bootloader adds
another interface with Get/SetConfig on Storage service. This result
that generic access no longer works and needs access via specific
interface.

reported on slack
https://suse.slack.com/archives/C02TLF25571/p1734924853266999

## Solution

Change code to avoid ambitious code.


## Testing

- *Tested manually*

service/lib/agama/dbus/clients/storage.rb

@@ -67,7 +67,8 @@ def finish
         #
         # @return [Hash]
         def config
-          serialized_config = dbus_object.GetConfig
+          # Use storage iface to avoid collision with bootloader iface
+          serialized_config = dbus_object[STORAGE_IFACE].GetConfig
           JSON.parse(serialized_config, symbolize_names: true)
         end
 
@@ -76,7 +77,8 @@ def config
         # @param config [Hash]
         def config=(config)
           serialized_config = JSON.pretty_generate(config)
-          dbus_object.SetConfig(serialized_config)
+          # Use storage iface to avoid collision with bootloader iface
+          dbus_object[STORAGE_IFACE].SetConfig(serialized_config)
         end
 
       private

service/package/rubygem-agama-yast.changes

@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Dec 23 18:40:01 UTC 2024 - Josef Reidinger <jreidinger@suse.com>
+
+- Fix collision between hotfix and new bootlaoder dbus interface
+  (gh#agama-project/agama#1852)
+
 -------------------------------------------------------------------
 Fri Dec 20 15:05:11 UTC 2024 - José Iván López González <jlopez@suse.com>