Allow inferring property type from its getter

#KT-550 Fixed

compiler/testData/diagnostics/tests/properties/inferenceFromGetters/topLevel.kt

@@ -0,0 +1,21 @@
+// !CHECK_TYPE
+val x get() = 1
+val y get() = id(1)
+val y2 get() = id(id(2))
+val z get() = l("")
+val z2 get() = l(id(l("")))
+
+val <T> T.u get() = id(this)
+
+fun <E> id(x: E) = x
+fun <E> l(<!UNUSED_PARAMETER!>x<!>: E): List<E> = null!!
+
+fun foo() {
+    x checkType { _<Int>() }
+    y checkType { _<Int>() }
+    y2 checkType { _<Int>() }
+    z checkType { _<List<String>>() }
+    z2 checkType { _<List<List<String>>>() }
+
+    1.u checkType { _<Int>() }
+}