Bump versions for 2020-11-06 release

[vinagesh]

Draft release notes:

Microsoft.Azure.Devices.Shared 1.29.0

• Add ClearAllMetadata() to remove all metadata from the twin and the base metadata object (fix(shared): Add ClearAllMetadata() to clear all metadata #1976)

Microsoft.Azure.Devices.Client 1.38.0

• Updated reference to Microsoft.Azure.Devices.Shared nuget.
• Update client with option to not dispose user supplied AuthenticationWithTokenRefresh : IAuthenticationMethod, IDisposable supplied during client initialization (Update client to not dispose user supplied IDisposable types #1954), (Update AuthenticationWithTokenRefresh disposal fix to be non-breaking #2003)

Microsoft.Azure.Devices 1.35.0

• Updated reference to Microsoft.Azure.Devices.Shared nuget.
• Add AAD auth support to Azure US Government cloud. (feat(service): Add AAD auth support to Azure US Government cloud. #1967)

Microsoft.Azure.Devices.Provisioning.Client 1.17.2

• Updated reference to Microsoft.Azure.Devices.Shared nuget.

Microsoft.Azure.Devices.Provisioning.Service 1.17.2

• Updated reference to Microsoft.Azure.Devices.Shared nuget.

Microsoft.Azure.Devices.Provisioning.Transport.Amqp 1.14.2

• Updated reference to Microsoft.Azure.Devices.Shared nuget.

Microsoft.Azure.Devices.Provisioning.Client.Transport.Http 1.13.2

• Updated reference to Microsoft.Azure.Devices.Shared nuget.

Microsoft.Azure.Devices.Provisioning.Transport.Mqtt 1.15.2

• Updated reference to Microsoft.Azure.Devices.Shared nuget.

Microsoft.Azure.Devices.Provisioning.Security.Tpm 1.13.2

• Updated reference to Microsoft.Azure.Devices.Shared nuget.

[abhipsaMisra]

For "Update client with option to not dispose user supplied IDisposable types (#1954), (#2003)" , how about:
Update client with option to not dispose user supplied AuthenticationWithTokenRefresh : IAuthenticationMethod, IDisposable supplied during client initialization (#1954), (#2003)

[timtay-microsoft]

Marking this as "do not merge" while we figure out if we even want to support custom token audience for AAD authentication