[K/N] Fix work with adapted function references

Their parsing was totally incorrect for K2, and sometimes incorrect for
K1. After this commit it uses same code as for JVM.

^KT-55462

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

@@ -2,8 +2,6 @@
 // WASM_MUTE_REASON: FAILS_IN_JS_IR
 // IGNORE_BACKEND: JS, JS_IR
 // IGNORE_BACKEND: JS_IR_ES6
-// KT-55462
-// IGNORE_BACKEND_K2: NATIVE
 // FILE: test.kt
 
 fun checkEqual(x: Any, y: Any) {