Cap UI port at max value

[Sushisource]

What was changed

Cap maximum UI port value

Why?

Overflow bad

Checklist

1. Closes

2. How was this tested:

3. Any docs updates needed?

[Sushisource]

Relates to temporalio/sdk-core#816

[josh-berry]

This increases the probability of 65535 being chosen randomly (vs. other port numbers). Can we instead do something like:

Suggested change

	if opts.UIPort > 65535 {
	opts.UIPort = 65535
	}
	if opts.UIPort > 65535 {
	opts.UIPort = (t.Port - 1024) % (65536 - 1024) + 1024
	}

(why keep the if-statement at all? To preserve backward compatibility with the existing +1000 behavior)

[Sushisource]

That's factually true, but, who cares? I can't imagine why that really matters at all.

[josh-berry]

Oops I actually meant to approve this before, sorry. Re. the port distribution comment, I don't actually care that much, was just a thought