`from_iter` implementation may run indefinitely

Creating a vector or a matrix with the `from_iter` method may run indefinitely. I don't think this is the expected behaviour. I.e.
```rust
#[test]
fn test_nalgebra_finishes() {
use nalgebra::DVector; // 0.32.5
use std::iter;
// Runs indefinitely
let _vector = DVector::from_iterator(70, iter::from_fn(|| Some(1)));
}
```
will never finish. ([Playground](https://play.rust-lang.org/?version=stable&mode=release&edition=2021))

I think it would make sense to either:

1. Limit the iterator automatically and ignore the remaining entries.
2. Panic if the iterator has elements remaining if the capacity has been reached.