K2: Propagate explicit getter type to the property without initializer

In K1, we have the rules like:
- if there's explicit type of a property, then use it
- if there's an initializer, obtain its expression-type
- Otherwise, use getter's return type

The case when getter's type is implicit is handled at
FirDeclarationsResolveTransformer.transformProperty

^KT-56707 Fixed

compiler/frontend.common/src/org/jetbrains/kotlin/KtSourceElement.kt

@@ -262,6 +262,9 @@ sealed class KtFakeSourceElementKind(final override val shouldSkipErrorTypeRepor
 
     // Synthetic calls for if/when/try/etc.
     object SyntheticCall : KtFakeSourceElementKind()
+
+    // When property doesn't have an initializer and explicit return type, but its getter's return type is specified
+    object PropertyTypeFromGetterReturnType : KtFakeSourceElementKind()
 }
 
 sealed class AbstractKtSourceElement {