Apple: fix bus error on smaller readonly file in unix

[vtjnash]

Enables the fix for #28245 in #44354 for Apple now that the Julia bug is fixed by #55641.

Closes #28245

[vtjnash]

Looks like this still runs into a different bug in stat:

SharedArrays(1) |        started at 2024-09-24T11:45:14.700
System max size of single shmem segment(MB) : 4
System max size of all shmem segments(MB) : 16
Requested size(MB) : 0
Please ensure requested size is within system limits.
If not, increase system limits and try again.
SharedArrays(1) |         failed at 2024-09-24T11:45:22.581
Error During Test at /Users/jameson/julia/test/testdefs.jl:24
  Got exception outside of a @test
  LoadError: stat returned zero type for a valid path
  Stacktrace:
    [1] error(s::String)
      @ Base ./error.jl:44
    [2] stat(fd::RawFD)
      @ Base.Filesystem ./stat.jl:180
    [3] stat
      @ ./iostream.jl:63 [inlined]
    [4] filesize(s::IOStream)
      @ Base ./iostream.jl:234
    [5] mmap(io::IOStream, ::Type{Array{Int64, 3}}, dims::Tuple{Int64, Int64, Int64}, offset::Int64; grow::Bool, shared::Bool)
      @ Mmap ~/julia/usr/share/julia/stdlib/v1.12/Mmap/src/Mmap.jl:214