[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/fir/analysis-tests/testData/resolve/overrides/simple.kt

@@ -14,7 +14,7 @@ class B : A() {
     fun test() {
         foo()
         bar()
-        <!INAPPLICABLE_CANDIDATE!>buz<!>()
+        <!NONE_APPLICABLE!>buz<!>()
     }
 }
 

compiler/fir/analysis-tests/testData/resolve/overrides/simple.txt

@@ -37,7 +37,7 @@ FILE: simple.kt
         public final fun test(): R|kotlin/Unit| {
             this@R|/B|.R|/B.foo|()
             this@R|/B|.R|/B.bar|()
-            <Inapplicable(PARAMETER_MAPPING_ERROR): [/B.buz, /A.buz]>#()
+            <Ambiguity: buz, [/B.buz, /A.buz]>#()
         }
 
     }

compiler/fir/analysis-tests/testData/resolve/overrides/supertypeGenericsComplex.txt

@@ -24,5 +24,5 @@ FILE: supertypeGenericsComplex.kt
     }
     public final fun f(list: R|kotlin/collections/MutableList<X>|, s: R|kotlin/collections/MutableList<kotlin/CharSequence>|): R|kotlin/Unit| {
         R|/C.C|().R|FakeOverride</C.f: R|kotlin/Unit|>|<R|X|>(R|<local>/list|, R|<local>/s|)
-        R|/C.C|().<Inapplicable(INAPPLICABLE): [/C.f]>#(R|<local>/s|, R|<local>/list|)
+        R|/C.C|().<Inapplicable(INAPPLICABLE): /C.f>#<R|kotlin/CharSequence|>(R|<local>/s|, R|<local>/list|)
     }