ci: bump to go 1.23 (#453)

Upgrade to Go 1.23.

Upgrade also requires bumping `golangci-lint` to v1.62.2, and upgrading
third-party test versions for some failing cases.

internal/inst/table_test.go

@@ -44,7 +44,7 @@ func TestFormDupes(t *testing.T) {
 
 func HasFormDupe(i inst.Instruction) bool {
 	n := len(i.Forms)
-	for a := 0; a < n; a++ {
+	for a := range n {
 		for b := a + 1; b < n; b++ {
 			if reflect.DeepEqual(i.Forms[a], i.Forms[b]) {
 				return true