Optimize withAll on MutableIntStackFactoryImpl and ImmutableIntStackFactoryImpl

[TheJavaGuy]

The code currently in withAll on both mutable and immutable implementations calls toArray on IntStream which if the Stream is very large can be extremely expensive.

Current mutable factory code:

public MutableIntStack withAll(IntStream items)
{
    return this.with(items.toArray());
}

Current immutable factory code:

public ImmutableIntStack withAll(IntStream items)
{
    return this.with(items.toArray());
}

It would be much better to simply iterate over the Stream and push the results to a IntArrayStack.

[TheJavaGuy]

I've created this issue as a counterpart to #1372. @nikhilnanivadekar @donraab if you gentlemen agree this is worth pursuing, I could solve it in a similar manner.

[donraab]

Sounds reasonable to me. I've assigned the issue to you. We can review the code when you submit a PR. Thanks!

[aditya-32]

Hi @donraab can i contribute to this, if no one is working on this

[TheJavaGuy]

@donraab If @aditya-32 wants to take this over I'm OK with it, please reassign issue to them.