go/types,types2: move notinheap tests to fixedbugs directory

So they can be added to ignored list, since the tests now require
cgo.Incomplete, which is not recognized by go/types and types2.

Updates #46731

Change-Id: I9f24e3c8605424d1f5f42ae4409437198f4c1326
Reviewed-on: https://go-review.googlesource.com/c/go/+/427142
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>

src/cmd/compile/internal/types2/stdlib_test.go

@@ -206,6 +206,8 @@ func TestStdFixed(t *testing.T) {
 		"issue42076.go",
 		"issue46903.go",
 		"issue51733.go",
+		"notinheap2.go",
+		"notinheap3.go",
 	)
 }
 

src/go/types/stdlib_test.go

@@ -208,6 +208,8 @@ func TestStdFixed(t *testing.T) {
 		"issue42076.go",
 		"issue46903.go",
 		"issue51733.go",
+		"notinheap2.go",
+		"notinheap3.go",
 	)
 }
 

test/run.go

@@ -1965,14 +1965,14 @@ func overlayDir(dstRoot, srcRoot string) error {
 
 // List of files that the compiler cannot errorcheck with the new typechecker (types2).
 var types2Failures = setOf(
-	"notinheap.go",            // types2 doesn't report errors about conversions that are invalid due to //go:notinheap
 	"shift1.go",               // types2 reports two new errors which are probably not right
 	"fixedbugs/issue10700.go", // types2 should give hint about ptr to interface
 	"fixedbugs/issue18331.go", // missing error about misuse of //go:noescape (irgen needs code from noder)
 	"fixedbugs/issue18419.go", // types2 reports no field or method member, but should say unexported
 	"fixedbugs/issue20233.go", // types2 reports two instead of one error (preference: 1.17 compiler)
 	"fixedbugs/issue20245.go", // types2 reports two instead of one error (preference: 1.17 compiler)
 	"fixedbugs/issue31053.go", // types2 reports "unknown field" instead of "cannot refer to unexported field"
+	"fixedbugs/notinheap.go",  // types2 doesn't report errors about conversions that are invalid due to //go:notinheap
 )
 
 var types2Failures32Bit = setOf(