[AA] Use MODULE_KIND in standalone API multi-module binary tests

- `MODULE_KIND` is a more general and straight-forward approach than an
  "app" magic module name.

^KT-64468

analysis/analysis-api/testData/standalone/multiModuleBinary/propertiesInNestedObject.kt

@@ -16,6 +16,7 @@ class Outer {
 }
 
 // MODULE: app(lib)
+// MODULE_KIND: Source
 // FILE: main.kt
 
 package some