Introduce AdaptedFunctionReference runtime class

It's used as a superclass for anonymous classes for adapted function
references. Its main feature is that it _doesn't_ inherit from KFunction
(as opposed to FunctionReference), as per the decision to postpone
reflection support for adapted function references in KT-36024.

 #KT-36024 Fixed

compiler/testData/codegen/box/callableReference/equality/capturedDefaults.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND: JVM_IR, JS, JS_IR, NATIVE
+// IGNORE_BACKEND: JS, JS_IR, NATIVE
 // FILE: test.kt
 
 fun checkEqual(x: Any, y: Any) {

compiler/testData/codegen/box/callableReference/equality/capturedVararg.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND: JVM_IR, JS, JS_IR, NATIVE
+// IGNORE_BACKEND: JS, JS_IR, NATIVE
 // IGNORE_BACKEND_FIR: JVM_IR
 // FILE: test.kt
 

compiler/testData/codegen/box/callableReference/equality/coercionToUnit.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND: JVM_IR, JS, JS_IR, NATIVE
+// IGNORE_BACKEND: JS, JS_IR, NATIVE
 // IGNORE_BACKEND_FIR: JVM_IR
 // FILE: test.kt
 

compiler/testData/codegen/box/callableReference/equality/coercionToUnitWithDefaults.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND: JVM_IR, JS, JS_IR, NATIVE
+// IGNORE_BACKEND: JS, JS_IR, NATIVE
 // IGNORE_BACKEND_FIR: JVM_IR
 // FILE: test.kt
 

compiler/testData/codegen/box/callableReference/equality/coercionToUnitWithVararg.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND: JVM_IR, JS, JS_IR, NATIVE
+// IGNORE_BACKEND: JS, JS_IR, NATIVE
 // IGNORE_BACKEND_FIR: JVM_IR
 // FILE: test.kt
 

compiler/testData/codegen/box/callableReference/equality/varargWithDefaults.kt

@@ -1,4 +1,4 @@
-// IGNORE_BACKEND: JVM_IR, JS, JS_IR, NATIVE
+// IGNORE_BACKEND: JS, JS_IR, NATIVE
 // IGNORE_BACKEND_FIR: JVM_IR
 // FILE: test.kt
 

compiler/testData/codegen/box/callableReference/noReflectionForAdaptedCallableReferences.kt

@@ -30,9 +30,8 @@ fun box(): String {
     checkAny("::CWithDefaults", ::CWithDefaults)
     checkAny("::CWithVarargs", ::CWithVarargs)
 
-    // TODO KT-37604
-    // checkUnit("::CWithDefaults", ::CWithDefaults)
-    // checkUnit("::CWithVarargs", ::CWithVarargs)
+    checkUnit("::CWithDefaults", ::CWithDefaults)
+    checkUnit("::CWithVarargs", ::CWithVarargs)
 
     return "OK"
-}
+}

compiler/testData/codegen/box/reflection/methodsFromAny/adaptedCallableReferencesNotEqualToCallablesFromAPI.kt

@@ -1,6 +1,4 @@
 // TARGET_BACKEND: JVM
-// Temporarily ignored for JVM until KT-36024 is fixed.
-// IGNORE_BACKEND: JVM
 // IGNORE_BACKEND_FIR: JVM_IR
 // WITH_REFLECT