checker, cgen: fix arrays alias built-in methods call(fix #19896)

[shove70]

1. Fixed it keyword does not work for an aliased array,  #19896
2. Fixed built-in methods: filter, map, any, all, sort, sorted, contains.
3. Add tests.

enum MsgType {
	null  = 0
	text  = 1
	ctrl  = 2
	frame = 3
}

struct Msg {
	msg_type MsgType
	payload  []u8
}

type Msgs = []Msg

fn main() {
	msgs0 := [Msg{
		msg_type: .null
	}, Msg{
		msg_type: .text
	}, Msg{
		msg_type: .null
	}, Msg{
		msg_type: .frame
	}]

	// it works without aliased msg
	msgs1 := msgs0.clone()
	null_msgs1 := msgs1.filter(it.msg_type == .null)
	dump(null_msgs1)

	// with aliased array
	msgs2 := Msgs(msgs0)
	null_msgs2 := msgs2.filter(it.msg_type == .null)
	dump(null_msgs2)
}

outputs:

[a.v:29] null_msgs1: [Msg{
    msg_type: null
    payload: []
}, Msg{
    msg_type: null
    payload: []
}]
[a.v:34] null_msgs2: Msgs([Msg{
    msg_type: null
    payload: []
}, Msg{
    msg_type: null
    payload: []
}])

[spytheman]

Excellent work.