K2: fix "private to this" determination logic in accordance with K1

#KT-61844 Fixed

compiler/testData/diagnostics/tests/resolve/invoke/privateInvokeOwner.fir.kt

@@ -1,11 +0,0 @@
-// ISSUE: KT-61844
-// FIR_DUMP
-
-class Foo<I, out O>(
-    private val transformer: (I) -> O,
-) {
-    fun <I, O> transform(foo: Foo<I, O>, bar: I) {
-        foo.<!FUNCTION_EXPECTED!>transformer<!>(bar)
-        foo.<!INVISIBLE_REFERENCE!>transformer<!>.invoke(bar)
-    }
-}

compiler/testData/diagnostics/tests/resolve/invoke/privateInvokeOwner.fir.txt

@@ -1,15 +1,15 @@
-FILE: privateInvokeOwner.fir.kt
+FILE: privateInvokeOwner.kt
     public final class Foo<I, out O> : R|kotlin/Any| {
         public constructor<I, out O>(transformer: R|(I) -> O|): R|Foo<I, O>| {
             super<R|kotlin/Any|>()
         }
 
-        private/*private to this*/ final val transformer: R|(I) -> O| = R|<local>/transformer|
-            private/*private to this*/ get(): R|(I) -> O|
+        private final val transformer: R|(I) -> O| = R|<local>/transformer|
+            private get(): R|(I) -> O|
 
         public final fun <I, O> transform(foo: R|Foo<I, O>|, bar: R|I|): R|kotlin/Unit| {
-            R|<local>/foo|.<Expression 'transformer' of type 'kotlin/Function1<I, O>' cannot be invoked as a function>#(R|<local>/bar|)
-            R|<local>/foo|.R|SubstitutionOverride</Foo.transformer: R|(I) -> O|><HIDDEN: /Foo.transformer is invisible>#|.R|SubstitutionOverride<kotlin/Function1.invoke: R|O|>|(R|<local>/bar|)
+            R|<local>/foo|.R|SubstitutionOverride</Foo.transformer: R|(I) -> O|>|.R|SubstitutionOverride<kotlin/Function1.invoke: R|O|>|(R|<local>/bar|)
+            R|<local>/foo|.R|SubstitutionOverride</Foo.transformer: R|(I) -> O|>|.R|SubstitutionOverride<kotlin/Function1.invoke: R|O|>|(R|<local>/bar|)
         }
 
     }

compiler/testData/diagnostics/tests/resolve/invoke/privateInvokeOwner.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // ISSUE: KT-61844
 // FIR_DUMP