Everywhere: Remove "LibC/" includes, add lint-rule against it

Author: https://github.com/BenWiederhake
Commit: 3281050359
Pull-request: https://github.com/SerenityOS/serenity/pull/16791
Reviewed-by: https://github.com/ADKaster ✅

Userland/Libraries/LibC/stdio.cpp

@@ -11,9 +11,9 @@
 #include <AK/PrintfImplementation.h>
 #include <AK/ScopedValueRollback.h>
 #include <AK/StdLibExtras.h>
-#include <LibC/bits/mutex_locker.h>
-#include <LibC/bits/stdio_file_implementation.h>
 #include <assert.h>
+#include <bits/mutex_locker.h>
+#include <bits/stdio_file_implementation.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <stdarg.h>