[IR] Fix mangling generic properties from IR-based descriptors

For type parameters of generic properties,
`DeclarationDescriptor#getContainingDeclaration` must return
the property descriptor instead of the accessor function descriptor.

^KT-57436 Fixed

compiler/testData/ir/irText/expressions/callableReferences/genericLocalClassConstructorReference.kt

@@ -1,5 +1,5 @@
 // MUTE_SIGNATURE_COMPARISON_K2: ANY
-// ^ KT-57429, KT-57436
+// ^ KT-57429
 
 open class L<LL>(val ll: LL)