lua: Merge lua 5.4.8
Pick up a few bug fixes from lua 5.4.8:
267ef461 Bug: check for constructor overflow in [exp] fields
d1ee2a4d Bug: Bad error message with fields of string _ENV
3fe7be95 Bug: message handler can be overwritten
983bc433 Bug: Use after free in 'luaV_finishset'
25da574f Bug: 'luaD_seterrorobj' should not raise errors
f5e55be2 Bug: Missing error status in panic function
9f0c0fe0 Bug: Wrong limit for local variables in 16-bit systems
782ef85b Bug: wrong code gen. for indices with comparisons
30982bec Bug: Bad stack manipulation in 'multiline' (REPL)