Auto-sync with upstream branch release/2.32/master
    
    Upstream commit: 1799ac8eabe87acd7b1ef7c3a483171489563482
    
    - support: Typo and formatting fixes
    - support: Pass environ to child process
    - Fix SXID_ERASE behavior in setuid programs (BZ #27471)
    - Enhance setuid-tunables test
    - tst-env-setuid: Use support_capture_subprogram_self_sgid
    - support: Add capability to fork an sgid child
    - S390: Also check vector support in memmove ifunc-selector [BZ #27511]
    - powerpc64: Workaround sigtramp vdso return call
    - nscd: Fix double free in netgroupcache [BZ #27462]