Add Support unit tests for Arrays and remove a ToString overload, #1114 (#1121)

* Some code cleanup in Arrays

* WIP Arrays tests for Fill, #1114

* WIP Arrays tests for Equals, #1114

* Finish Arrays tests, remove ToString overload with IFormatProvider, #1114

* PR feedback

Author: paulirwin

src/Lucene.Net.Facet/FacetResult.cs

@@ -117,7 +117,7 @@ public string ToString(IFormatProvider? provider)
             sb.Append("dim=");
             sb.Append(Dim);
             sb.Append(" path=");
-            sb.Append(Arrays.ToString(Path, provider));
+            sb.Append(Arrays.ToString(Path));
             sb.Append(" value=");
             if (TypeOfValue == typeof(int))
             {