checker, fmt: fix static methods not recognized when imported from a module(fix #19127)

[shove70]

1. Fix Static type methods not recognized when imported from a module #19127
2. Add tests.

module main

import amod { SomeStruct }

fn main() {
	result := SomeStruct.new()
	println(result)
}

output:

amod.SomeStruct{}

[spytheman]

Good work.