shuf -i 1-100000000000 -n 256 cause memory allocation failure

[oech3]

$ target/release/shuf -i 1-100000000000 -n 256
memory allocation of 799999998208 bytes failed
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Maybe, we should optimize

coreutils/src/uu/shuf/src/nonrepeating_iterator.rs

Line 53 in ba94c69

const MAX_CAPACITY: usize = 128; // todo: optimize this

for -n .

[oech3]

It was not too easy... I see large performance drop by using size cap with head-count...