Allow shared channel remotes endpoint to be filtered by confirmation status (#28213)

* Allow shared channel remotes endpoint to be filtered by confirmation status

* Adds tests

api/v4/source/sharedchannels.yaml

@@ -65,6 +65,16 @@
           required: true
           schema:
             type: string
+        - name: include_unconfirmed
+          in: query
+          description: Include those Shared channel remotes that are unconfirmed
+          schema:
+            type: boolean
+        - name: exclude_confirmed
+          in: query
+          description: Show only those Shared channel remotes that are not confirmed yet
+          schema:
+            type: boolean
         - name: exclude_home
           in: query
           description: Show only those Shared channel remotes that were shared with this server