[NI] Provide diagnostics for candidates in "allCandidates" mode

This helps for completion as it use diagnostics to clip extra
 candidates

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/KotlinCallCompleter.kt

@@ -58,8 +58,9 @@ class KotlinCallCompleter(
         expectedType: UnwrappedType?,
         resolutionCallbacks: KotlinResolutionCallbacks
     ): CallResolutionResult {
-        val diagnosticsHolder = KotlinDiagnosticsHolder.SimpleHolder()
-        for (candidate in candidates) {
+        val completedCandidates = candidates.map { candidate ->
+            val diagnosticsHolder = KotlinDiagnosticsHolder.SimpleHolder()
+
             candidate.addExpectedTypeConstraint(
                 candidate.returnTypeWithSmartCastInfo(resolutionCallbacks), expectedType, resolutionCallbacks
             )
@@ -72,8 +73,10 @@ class KotlinCallCompleter(
                 resolutionCallbacks,
                 collectAllCandidatesMode = true
             )
+
+            CandidateWithDiagnostics(candidate, diagnosticsHolder.getDiagnostics() + candidate.diagnosticsFromResolutionParts)
         }
-        return AllCandidatesResolutionResult(candidates)
+        return AllCandidatesResolutionResult(completedCandidates)
     }
 
     private fun KotlinResolutionCandidate.runCompletion(

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/model/ResolutionAtoms.kt

@@ -203,9 +203,11 @@ class ErrorCallResolutionResult(
 ) : SingleCallResolutionResult(resultCallAtom, diagnostics, constraintSystem)
 
 class AllCandidatesResolutionResult(
-    val allCandidates: Collection<KotlinResolutionCandidate>
+    val allCandidates: Collection<CandidateWithDiagnostics>
 ) : CallResolutionResult(null, emptyList(), ConstraintStorage.Empty)
 
+data class CandidateWithDiagnostics(val candidate: KotlinResolutionCandidate, val diagnostics: List<KotlinCallDiagnostic>)
+
 fun CallResolutionResult.resultCallAtom(): ResolvedCallAtom? =
     if (this is SingleCallResolutionResult) resultCallAtom else null