ci: IWYU job giving incorrect suggestions #34237

1. 
   fanquake commented at 11:45 am on January 9, 2026: member

   As pointed out here: #33810 (review):

   +#include <assert.h>

   Suggesting <assert.h> is incorrect, and if the dev applied that diff, clang-tidy will fail with modernize-deprecated-headers.

2. fanquake added the label Tests on Jan 9, 2026
3. 
   fanquake commented at 11:45 am on January 9, 2026: member

   cc @hebasto

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