texlive 2021 fails on tests on Arm and PowerPC:
https://build.opensuse.org/package/show/openSUSE:Factory:ARM/texlive
https://build.opensuse.org/package/show/openSUSE:Factory:PowerPC/texlive

It succeeds in Publishing:TeXLive project becauseof the project config which
contains:
%if "%_repository" == "openSUSE_Factory" || "%_repository" ==
"openSUSE_Factory_ARM" || "%_repository" == "openSUSE_Factory_PowerPC" ||
"%_repository" == "openSUSE_Tumbleweed"
Substitute: lua-devel lua53-devel
Preinstall: liblua5_3-5 !liblua5_3
%endif

IMHO, this part should dropped to detect build failures which happen in
Factory:* projects.

The tests are broken with lua 5.4 whereas they pass with lua 5.3. AFAICS, only
the 'sortinithash' is different in failing tests:
# -      \\field{sortinithash}{8de16967003c7207dae369d874f1456e}
# +      \\field{sortinithash}{d7095fff47cda75ca2589920aae98399}