ast, parser: fix generic fn type with different generic type call (fix #22306)

[yuyi98]

This PR fix generic fn type with different generic type call (fix #22306).

• Fix generic fn type with different generic type call.
• Add test.

type Fn[T] = fn () T

fn problem[X](f Fn[X]) X {
	return f[X]()
}

fn foo() int {
	return 1
}

fn main() {
	t := problem[int](foo)
	println(t)
}

PS D:\Test\v\tt1> v run .
1

[spytheman]

Excellent work.