Bump Cosmos SDK to 3.33.0 and remove PartitionKey.None workaround

[liliankasem]

Bump Cosmos SDK to 3.33.0 and remove PartitionKey.None workaround in the CosmosDBConverter.

// Workaround until bug in Cosmos SDK is fixed
// Currently pending release: https://github.com/Azure/azure-cosmos-dotnet-v3/commit/d6e04a92f8778565eb1d1452738d37c7faf3c47a
QueryRequestOptions queryRequestOptions = new();
if (partitionKey != PartitionKey.None)
{
    queryRequestOptions = new() { PartitionKey = partitionKey };
}

to

QueryRequestOptions queryRequestOptions = new() { PartitionKey = partitionKey };

This is the commit that we are waiting to be released in the Cosmos SDK:

• Azure/azure-cosmos-dotnet-v3@d6e04a9

Note to double check which version this release goes into