Refactoring. Moved error checks (for abstract, super)

to CandidateResolver

 Added error SUPER_CANT_BE_EXTENSION_RECEIVER (it was SUPER_IS_NOT_AN_EXPRESSION)

compiler/testData/diagnostics/tests/declarationChecks/kt559.kt

@@ -25,6 +25,6 @@ abstract class D(): A() {
         super.<!ABSTRACT_SUPER_CALL!>i<!>
 
         super.fff() //everything is ok
-        return super.<!ABSTRACT_SUPER_CALL!>foo()<!>  //no error!!
+        return super.<!ABSTRACT_SUPER_CALL!>foo<!>()  //no error!!
     }
 }

compiler/testData/diagnostics/tests/extensions/ExtensionsCalledOnSuper.kt

@@ -14,7 +14,7 @@ class C : T {
         fun T.buzz() {}
         fun T.buzz1() {}
         super.foo() // OK
-        <!SUPER_IS_NOT_AN_EXPRESSION!>super<!>.bar() // Error
+        <!SUPER_CANT_BE_EXTENSION_RECEIVER!>super<!>.bar() // Error
         super.buzz() // OK, resolved to a member
         super.buzz1(<!NO_VALUE_FOR_PARAMETER!>)<!> // Resolved to a member, but error: no parameter passed where required
     }

compiler/testData/diagnostics/tests/thisAndSuper/superInExtensionFunctionCall.kt

@@ -1,6 +1,6 @@
 // No supertype at all
 class A1 {
     fun test() {
-        <!SUPER_IS_NOT_AN_EXPRESSION!>super<!>.identityEquals(null) // Call to an extension function
+        <!SUPER_CANT_BE_EXTENSION_RECEIVER!>super<!>.identityEquals(null) // Call to an extension function
     }
 }