esmoduleinterop: Improve error message when calling static method on class

**TypeScript Version:** master **Code** **b.d.ts**: ```ts declare class C { static m(): void } declare namespace C {} export = C; ``` ```ts import * as C from "./b"; C.m(); ``` **Expected behavior:** ``` src/a.ts(1,1): error TS7038: A namespace-style import will import a module namespace object, not a class. src/a.ts(2,3): error TS2339: Property 'm' does not exist on type 'typeof C'. ``` **Actual behavior:** `src/a.ts(2,3): error TS2339: Property 'm' does not exist on type 'typeof C'.`