FIR: Add ConeVisibilityError to distinguish between candidates that are

invisible versus hidden due to deprecation.

compiler/resolution.common/src/org/jetbrains/kotlin/resolve/calls/tower/CandidateApplicability.kt

@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.resolve.calls.tower
 enum class CandidateApplicability {
     RESOLVED_TO_SAM_WITH_VARARG, // migration warning up to 1.5 (when resolve to function with SAM conversion and array without spread as vararg)
     HIDDEN, // removed from resolve
+    VISIBILITY_ERROR, // problems with visibility
     UNSUPPORTED, // unsupported feature
     INAPPLICABLE_WRONG_RECEIVER, // receiver not matched
     INAPPLICABLE_ARGUMENTS_MAPPING_ERROR, // arguments not mapped to parameters (i.e. different size of arguments and parameters)
@@ -15,7 +16,7 @@ enum class CandidateApplicability {
     INAPPLICABLE_MODIFIER, // no expected modifier (eg infix call on non-infix function)
     NO_COMPANION_OBJECT, // Classifier does not have a companion object
     IMPOSSIBLE_TO_GENERATE, // access to outer class from nested
-    RUNTIME_ERROR, // problems with visibility
+    RUNTIME_ERROR, // TODO: FE 1.0 uses this as catch-all for all other errors. Consider re-assigning those diagnostics.
     UNSAFE_CALL, // receiver or argument nullability doesn't match
     UNSTABLE_SMARTCAST, // unstable smart cast
     CONVENTION_ERROR, // missing infix, operator etc