fix storage nodes, some other minor fixes (#18932)

Author: adameat

ydb/core/viewer/pdisk_restart.h

@@ -114,7 +114,6 @@ class TJsonPDiskRestart : public TViewerPipeClient {
                     description: pdisk identifier
                     required: true
                     type: integer
-                    required: true
                   - name: timeout
                     in: query
                     description: timeout in ms