[Search] Enhance 'FacetsArentAutomaticallyParsed` test (#27237)

Add some more common "date-looking" strings and verify they are not automatically parsed as `DateTimeOffset`

sdk/search/Azure.Search.Documents/tests/DocumentOperations/SearchTests.cs

@@ -684,6 +684,8 @@ await client.UploadDocumentsAsync(
                     new FacetKeyValuePair("1", "9-6"),
                     new FacetKeyValuePair("2", "9.6"),
                     new FacetKeyValuePair("3", "9'6\""),
+                    new FacetKeyValuePair("4", "9/6"),
+                    new FacetKeyValuePair("5", "9\\6"),
                 });
             await resources.WaitForIndexingAsync();
 
@@ -694,13 +696,15 @@ await resources.GetQueryClient().SearchAsync<FacetKeyValuePair>(
 
             Assert.IsNotNull(response.Value.Facets);
             AssertFacetsEqual(
-                GetFacetsForField(response.Value.Facets, "Value", 3),
+                GetFacetsForField(response.Value.Facets, "Value", 5),
                 MakeValueFacet(1, "9'6\""),
                 MakeValueFacet(1, "9-6"),
-                MakeValueFacet(1, "9.6"));
+                MakeValueFacet(1, "9.6"),
+                MakeValueFacet(1, "9/6"),
+                MakeValueFacet(1, "9\\6"));
 
             // Check strongly typed value facets
-            ICollection<FacetResult> facets = GetFacetsForField(response.Value.Facets, "Value", 3);
+            ICollection<FacetResult> facets = GetFacetsForField(response.Value.Facets, "Value", 5);
             ValueFacetResult<string> first = facets.ElementAt(0).AsValueFacetResult<string>();
             Assert.AreEqual("9'6\"", first.Value);
             Assert.AreEqual(1, first.Count);
@@ -710,6 +714,12 @@ await resources.GetQueryClient().SearchAsync<FacetKeyValuePair>(
             ValueFacetResult<string> third = facets.ElementAt(2).AsValueFacetResult<string>();
             Assert.AreEqual("9.6", third.Value);
             Assert.AreEqual(1, third.Count);
+            ValueFacetResult<string> fourth = facets.ElementAt(3).AsValueFacetResult<string>();
+            Assert.AreEqual("9/6", fourth.Value);
+            Assert.AreEqual(1, fourth.Count);
+            ValueFacetResult<string> fifth = facets.ElementAt(4).AsValueFacetResult<string>();
+            Assert.AreEqual("9\\6", fifth.Value);
+            Assert.AreEqual(1, fifth.Count);
         }
 
         [Test]