[FIR] Improve diagnostic reporting & don't use error symbol for candidate if possible

Also introduce few new diagnostics:
- NONE_APPLICABLE more many inapplicable candidates
- HIDDEN for visible candidates

compiler/testData/diagnostics/tests/DeprecatedGetSetPropertyDelegateConvention.fir.kt

@@ -40,8 +40,8 @@ class Example {
     var d by CustomDelegate3()
 
     fun test() {
-        requireString(a)
-        requireString(aval)
+        <!INAPPLICABLE_CANDIDATE!>requireString<!>(a)
+        <!INAPPLICABLE_CANDIDATE!>requireString<!>(aval)
         requireString(b)
         requireInt(c)
         requireInt(d)