Fix diagnostic messages for properties.

Fix IDE tests.
Update quick fixes in IDE
(TODO: review new inheritance-related diagnostics with regards to quick fixes)

compiler/testData/diagnostics/tests/subtyping/kt3159.kt

@@ -4,6 +4,6 @@ interface Super {
 }
 
 class Sub: Super {
-    override var v: <!PROPERTY_TYPE_MISMATCH_ON_OVERRIDE!>String<!> = "fail"
+    override var v: <!VAR_TYPE_MISMATCH_ON_OVERRIDE!>String<!> = "fail"
     override val v2: String = "ok"
 }