Consider module as function call for highlighting

Their semantic is closer to a function call (like i.e: Bazel rules)
rather than a module/namespace.

Similarly for their properties, which are more like parameters than
members.

test/highlight/properties.bp

@@ -1,6 +1,6 @@
 foo {
     field: {
-    // <- variable.member
+    // <- variable.parameter
         key: 42,
         // <- property
     },