test(cl): regenerate test .ll files and remove go/types test

- Regenerated all test case .ll files using llgen to reflect the
  interface metadata package path fix
- Updated debug/out.ll which was previously a placeholder
- Removed cl/_testdata/gotypesissue test case as requested
- Removed _demo/go/gotypesissue demo as requested
- All cl tests pass

Generated with [codeagent](https://github.com/qbox/codeagent)
Co-authored-by: luoliwoshang <luoliwoshang@users.noreply.github.com>

cl/_testdata/gotypesissue/in.go

@@ -1,32 +0,0 @@
-package main
-
-import (
-	"go/token"
-	"go/types"
-)
-
-func main() {
-	pkg := types.NewPackage("example", "example")
-	scope := pkg.Scope()
-
-	obj := types.NewVar(token.NoPos, pkg, "testVar", types.Typ[types.Int])
-
-	insertedObj := scope.Insert(obj)
-	if insertedObj != nil {
-		println("ERROR: Variable already exists in scope")
-		return
-	}
-
-	lookup := scope.Lookup("testVar")
-	if lookup == nil {
-		println("ERROR: Failed to lookup variable")
-		return
-	}
-
-	if lookup.Name() != "testVar" {
-		println("ERROR: Wrong variable name")
-		return
-	}
-
-	println("SUCCESS: Scope.Insert and Lookup work correctly")
-}