Update dapr quickstarts to use new workflows client

[elena-kolevska]

Description

We need to update the quickstarts to use our wrappers of the durabletask clients (DaprWorkflowClient) instead of the deprecated methods on the DaprClient.

This is part of the following initiatives to remove the deprecated Dapr workflow methods from the client libraries:

• Remove obsolete workflow methods from DaprClient dotnet-sdk#1344
• Remove obsolete workflow methods go-sdk#634
• [WORKFLOW SDK FEATURE REQUEST] Remove obsolete dapr client workflow methods python-sdk#738

For example, in python we need to be using the DaprWorkflowClient instead of DaprClient .
This is an example of the "old" way: https://github.com/dapr/python-sdk/tree/main/examples/demo_workflow, and this is the "new" way: https://github.com/dapr/python-sdk/tree/main/examples/workflow.

More background on the issue: dapr/java-sdk#1012 (comment)

You can follow this guide on how to contribute to the quickstarts: https://www.youtube.com/live/cvxOv1Q_znA?t=175s

Tasks

• SDK Python Update Quickstart to use DaprWorkflowClient #1119
• SDK Go Update Quickstart to use DaprWorkflowClient #1120
• SDK .Net Update Quickstart to use DaprWorkflowClient #1121
• SDK Java Update Quickstart to use DaprWorkflowClient #1122
• SDK JS Update Quickstart to use DaprWorkflowClient #1123