[Report] Add report reopen action for closed reports (#7442)

- New Command_ReportReopen moderator command (extension 1206) with server
  handler that reopens resolved/dismissed reports, resets resolution state
  and notified, and records the reopening note in the audit log
- Reopen... button in the report queue action bar, gated to resolved and
  dismissed reports, with optional note prompt and tooltip
- Success confirmations for Assign, Resolve/Dismiss and Reopen now survive
  the list refresh via a pending status message instead of being clobbered
- Dispatch/auth coverage in server_moderator_role_test

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

tests/CMakeLists.txt

@@ -228,6 +228,18 @@ cockatrice_add_test(
   LABELS
   server
 )
+cockatrice_add_test(
+  NAME
+  server_moderator_role_test
+  NO_SANITIZE
+  SOURCES
+  server_moderator_role_test.cpp
+  LIBS
+  libcockatrice_network
+  libcockatrice_rng
+  LABELS
+  server
+)
 cockatrice_add_test(
   NAME
   server_game_join_test