[FIR] Consider anonymous object declarations in classDeclarationsStack in transformers

compiler/testData/diagnostics/tests/generics/anonymousObjectSupertypeWithTypeParameterFromFunction.kt

@@ -0,0 +1,9 @@
+// FIR_IDENTICAL
+abstract class Checker<StateT>
+
+class ToolchainPanel {
+    fun <ItemT> addVersionChecker(item: ItemT) {
+        class MyState(val selectedItem: ItemT?)
+        object : Checker<MyState>() {}
+    }
+}

compiler/testData/diagnostics/tests/generics/anonymousObjectSupertypeWithTypeParameterFromFunction.txt

@@ -0,0 +1,16 @@
+package
+
+public abstract class Checker</*0*/ StateT> {
+    public constructor Checker</*0*/ StateT>()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class ToolchainPanel {
+    public constructor ToolchainPanel()
+    public final fun </*0*/ ItemT> addVersionChecker(/*0*/ item: ItemT): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}