checker: fix checking match branch call expr twice (fix #20709)

[yuyi98]

This PR fix checking match branch call expr twice (fix #20709).

• Fix checking match branch call expr twice.
• Add test.

struct Foo {
mut:
	x int
}

struct Bar {
mut:
	y int
}

type Foobar = Foo | Bar

fn mutate_foobar1(mut foobar Foobar) {
	match foobar {
		Foo {
			mutate_foo(mut foobar)
		}
		Bar {
			mutate_bar(mut foobar)
		}
	}
}

fn mutate_foobar2(mut foobar Foobar) int {
	return match foobar {
		Foo {
			mutate_foo(mut foobar)
		}
		Bar {
			mutate_bar(mut foobar)
		}
	}
}

fn mutate_foo(mut foo Foo) int {
	foo.x = 5
	return 5
}

fn mutate_bar(mut bar Bar) int {
	bar.y = 10
	return 10
}

fn main() {
	mut bar := Bar{y: 0}
	mutate_foobar1(mut bar)
	mutate_foobar2(mut bar)
}

PS D:\Test\v\tt1> v run .
tt1.v:16:19: error: cannot use `&Foobar` as `&Foo` in argument 1 to `mutate_foo`
   14 |     match foobar {
   15 |         Foo {
   16 |             mutate_foo(mut foobar)
      |                            ~~~~~~
   17 |         }
   18 |         Bar {
tt1.v:19:19: error: cannot use `&Foobar` as `&Bar` in argument 1 to `mutate_bar`
   17 |         }
   18 |         Bar {
   19 |             mutate_bar(mut foobar)
      |                            ~~~~~~
   20 |         }
   21 |     }
tt1.v:27:19: error: cannot use `&Foobar` as `&Foo` in argument 1 to `mutate_foo`
   25 |     return match foobar {
   26 |         Foo {
   27 |             mutate_foo(mut foobar)
      |                            ~~~~~~
   28 |         }
   29 |         Bar {
tt1.v:30:19: error: cannot use `&Foobar` as `&Bar` in argument 1 to `mutate_bar`
   28 |         }
   29 |         Bar {
   30 |             mutate_bar(mut foobar)
      |                            ~~~~~~
   31 |         }
   32 |     }

[spytheman]

Excellent work.