Storage classes should not be described as middleware

[JonathanFingold]

Version

What package version of the SDK are you using. Main branch

Describe the bug

The Sphinx comments (used to generate the ref docs) describe the CosmosDbPartitionedStorage class as middleware. The term middleware has a specific meaning within the Bot Framework, and this is not it. I double checked with @stevengum to make sure I wasn't missing something (JavaScript has a similar bug, but just in 2 deprecated classes).

To Reproduce

Steps to reproduce the behavior:

1. Look at the """ comments in cosmosdb_partitioned_storage.py:
   • here:

     botbuilder-python/libraries/botbuilder-azure/botbuilder/azure/cosmosdb_partitioned_storage.py

     Lines 1 to 5 in bfc4860

     	"""CosmosDB Middleware for Python Bot Framework.
     	This is middleware to store items in CosmosDB.
     	Part of the Azure Bot Framework in Python.
     	"""

   • and here:

     botbuilder-python/libraries/botbuilder-azure/botbuilder/azure/cosmosdb_partitioned_storage.py

     Lines 69 to 70 in bfc4860

     	class CosmosDbPartitionedStorage(Storage):
     	"""The class for partitioned CosmosDB middleware for the Azure Bot Framework."""

2. Error: storage classes are not middleware (cannot be used as middleware in a middleware set) and should not be described as such.

Expected behavior

The reference documentation should not confuse concepts in this way.

Additional context

These comments also appear in the obsolete CosmosDbStorage class.

[JonathanFingold]

@tracyboehrer This should be handled by the devs, but the doc team can make strategic fixes to the doc comments. Please assign this to @emgrol if you'd like the doc team to work on this one.