Add rpc calls to unregister recordings from catalog (#8566)

### What

This adds two simple `rpc` calls, `UnregisterRecording` and
`UnregisterAllRecordings`, to the storage node interface.

crates/store/re_protos/proto/rerun/v0/remote_store.proto

@@ -12,8 +12,12 @@ service StorageNode {
     // metadata API calls
     rpc QueryCatalog(QueryCatalogRequest) returns (stream DataframePart) {}
     rpc UpdateCatalog(UpdateCatalogRequest) returns (UpdateCatalogResponse) {}
+
     // TODO(zehiko) support registering more than one recording at a time
     rpc RegisterRecording(RegisterRecordingRequest) returns (DataframePart) {}
+
+    rpc UnregisterRecording(UnregisterRecordingRequest) returns (UnregisterRecordingResponse) {}
+    rpc UnregisterAllRecordings(UnregisterAllRecordingsRequest) returns (UnregisterAllRecordingsResponse) {}
 }
 
 // ---------------- Common response message ------------------
@@ -41,6 +45,18 @@ message RegisterRecordingRequest {
     DataframePart metadata = 4;
 }
 
+// ---------------- Unregister from catalog ------------------
+
+message UnregisterRecordingRequest {
+    // unique identifier of the recording
+    rerun.common.v0.RecordingId recording_id = 1;
+}
+message UnregisterRecordingResponse {}
+
+message UnregisterAllRecordingsRequest {}
+message UnregisterAllRecordingsResponse {}
+
+
 // ---------------- UpdateCatalog  -----------------
 
 message UpdateCatalogRequest {