Refactor CallableReferencesResolutionUtils.kt

Get rid of trace & reportOn parameters of
createReflectionTypeForCallableDescriptor: move the two checks that required
them to DoubleColonExpressionResolver and combine with other checks into a
single function that checks the validity of the referenced symbol. This also
makes these checks reported only once when invalid expressions are passed as
function arguments (previously they were also reported from
getResolvedCallableReferenceShapeType).

Also inline getReflectionTypeForCandidateDescriptor after this, and refactor
its usages

compiler/testData/diagnostics/tests/callableReference/function/extensionInClassDisallowed.kt

@@ -1,4 +1,4 @@
-// !DIAGNOSTICS: -UNUSED_EXPRESSION
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 class A {
     fun Int.extInt() = 42
     fun A.extA(x: String) = x
@@ -6,9 +6,14 @@ class A {
     fun main() {
         Int::<!EXTENSION_IN_CLASS_REFERENCE_NOT_ALLOWED!>extInt<!>
         A::<!EXTENSION_IN_CLASS_REFERENCE_NOT_ALLOWED!>extA<!>
+
+        eat(Int::<!EXTENSION_IN_CLASS_REFERENCE_NOT_ALLOWED!>extInt<!>)
+        eat(A::<!EXTENSION_IN_CLASS_REFERENCE_NOT_ALLOWED!>extA<!>)
     }
 }
 
+fun eat(value: Any) {}
+
 fun main() {
     A::<!UNRESOLVED_REFERENCE!>extInt<!>
     A::<!UNRESOLVED_REFERENCE!>extA<!>