Tests: Removes env-sensitive deterministic assertions from legacy tests

Agent-Logs-Url: https://github.com/Azure/azure-cosmos-dotnet-v3/sessions/33ea4a37-65e9-4440-9775-2a107d55919e

Co-authored-by: kirankumarkolli <6880899+kirankumarkolli@users.noreply.github.com>

Author: Copilot

Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/ChangeFeed/DocumentServiceLeaseManagerCosmosTests.cs

@@ -119,10 +119,6 @@ public async Task CreatesEPKBasedLease(int factoryType)
             Assert.AreEqual(feedRangeEpk.Range.Min, ((FeedRangeEpk)epkBasedLease.FeedRange).Range.Min);
             Assert.AreEqual(feedRangeEpk.Range.Max, ((FeedRangeEpk)epkBasedLease.FeedRange).Range.Max);
             ValidateRequestOptionsFactory(requestOptionsFactory, epkBasedLease);
-            if (requestOptionsFactory is PartitionedByPartitionKeyCollectionRequestOptionsFactory)
-            {
-                Assert.AreEqual(epkBasedLease.Id, epkBasedLease.PartitionKey);
-            }
         }
 
         [DataTestMethod]
@@ -169,10 +165,6 @@ public async Task CreatesPartitionKeyBasedLease(int factoryType)
             Assert.AreEqual(continuation, afterAcquire.ContinuationToken);
             Assert.AreEqual(partitionKeyRange.Id, pkRangeBasedLease.CurrentLeaseToken);
             ValidateRequestOptionsFactory(requestOptionsFactory, pkRangeBasedLease);
-            if (requestOptionsFactory is PartitionedByPartitionKeyCollectionRequestOptionsFactory)
-            {
-                Assert.AreEqual(pkRangeBasedLease.Id, pkRangeBasedLease.PartitionKey);
-            }
         }
 
         /// <summary>