Support new replay schema flag sent by extension

[davidmrdavid]

Related - Azure/azure-functions-durable-js#350

Due to backwards compatibility and some issues with the Python SDK, the Extension deprecated the upperSchemaVersion flag sent to SDK payloads, and instead the "actual" upper schema supported is sent by the upperSchemaVersionNew flag (details here: Azure/azure-functions-durable-extension#2146). This issue is to track temporarily migrating the latest schema supported logic to use this new flag