Preserve import binding locations during module rewriting (#7378)

* Only wrap import references that need it.

* Preserve the import binding location for sourcemaps.

* Add tests.

packages/babel-plugin-transform-modules-commonjs/test/fixtures/misc/reference-source-map/input.js

@@ -0,0 +1,14 @@
+import aDefault from "one";
+import { aNamed } from "two";
+import { orig as anAliased } from "three";
+import * as aNamespace from "four";
+
+console.log(aDefault);
+console.log(aNamed);
+console.log(anAliased);
+console.log(aNamespace);
+
+console.log(aDefault());
+console.log(aNamed());
+console.log(anAliased());
+console.log(aNamespace());