Merge LUA 5.4.6

This is a bug fix to Lua 5.4.4 (5.4.5 was withdrawn due to ABI issues
and 5.4.6 is 5.4.5 with those fixed).

contrib/lua: update to 5.4.2

Merge commit '0ea45b9cd43ce1247eb3eee9bfd5cee3d19068e7' into main

MFC r366760: lua: update to 5.3.6

This release contains some minor bugfixes; notably:
- 2x minor Makefile fixes (not used in base)
- Long brackets with a huge number of '=' overflow some internal buffer
arithmetic.
- Joining an upvalue with itself can cause a use-after-free crash.

See here for examples: http://www.lua.org/bugs.html#5.3.5

MFC after: 2 weeks

MFV r337586: lua: Update to 5.3.5

Bugfix release, nothing too major.

Tested with: lualoader via userboot, lualoader live
Differential Revision: https://reviews.freebsd.org/D16665

Import lua 5.3.4 to contrib