clang-tidy: Fix all remaining misc-include-cleaner violations

- Remove unused includes
- Add common false positive headers to misc-include-cleaner.IgnoreHeaders
- Add IWYU pragma keep for uncommon false positive headers

src/test/test-tables.c

@@ -30,7 +30,6 @@
 #include "show-status.h"
 #include "socket.h"
 #include "socket-label.h"
-#include "socket-util.h"
 #include "swap.h"
 #include "test-tables.h"
 #include "tests.h"