faster rand(::RandomDevice, NTuple{N, UInt}) (#58288)
`RandomDevice` uses `Libc.getrandom!` to get randomness, but such a
system call is very expensive.
There was already a specialization for `rand!` on `Array`s of builtin
integers to have only one such call; this commit adds a similar
specialization for homogeneous tuples of builtin integer types.
One motivation is to instantiate `Xoshiro()` faster from
`RandomDevice()`, as requesting 4*64 bits of entropy from the system in
one go is, at least on my system, roughly 4 times faster that in 4
calls:
```
julia> @btime Xoshiro()
1.225 μs (1 allocation: 48 bytes) # master
319.068 ns (1 allocation: 48 bytes) # PR
```
