Merge pull request #19356 from Napalys/js/merge_classes

JS: Merge `ES6Class` to `FunctionStyleClass`

Author: Napalys

javascript/ql/lib/change-notes/2025-04-29-combined-es6-func.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Improved analysis for `ES6 classes` mixed with `function prototypes`, leading to more accurate call graph resolution.

javascript/ql/lib/semmle/javascript/ApiGraphs.qll

@@ -1236,7 +1236,7 @@ module API {
       exists(DataFlow::ClassNode cls | nd = MkClassInstance(cls) |
         ref = cls.getAReceiverNode()
         or
-        ref = cls.(DataFlow::ClassNode::FunctionStyleClass).getAPrototypeReference()
+        ref = cls.(DataFlow::ClassNode).getAPrototypeReference()
       )
       or
       nd = MkUse(ref)