Bump versions for 2021-10-08 .NET preview release

[abhipsaMisra]

Version bump guidelines followed:

• Devices.Client - API surface changed specifically for preview = patch version of the "main" version updated.
• All other packages - API surface changed as a result of main -> preview merge = patch version of the "preview" part of the version updated.

==== DRAFT NOTES ====

SDK updates from main branch.

This release is bringing changes from the main release 2021-08-11.
The previous preview release was based on the main release 2021-05-13.

Microsoft.Azure.Devices.Shared 1.29.0-preview-002

• Updates from GA release 2021-08-11.

Microsoft.Azure.Devices.Client 1.38.1-preview-001

• Updates from GA release 2021-08-11.
• Update native Azure IoT Plug and Play (PnP) APIs:
  • Update the TryGetValue methods to return false instead of throwing exceptions for some corner cases (TryGetValue methods should check for the component identifier when applicable and should not throw any exceptions #2111).
  • Expose both client reported and service requested properties under their specific accessors - ClientProperties.ReportedFromClient and ClientProperties.WritablePropertyRequests respectively (ClientProperties related updates #2114)
  • Add checks for ClientPropertiesUpdateResponse initialization (fix(iot-device): Add checks to verify that client property update response has version #2115).
  • Add convenience method for acknowledging writable property update requests (Add convenience method for acknowledging writable property update requests #2157).
  • Update PayloadCollection to accept dictionary of values ([PnP] Update PayloadCollection to accept dictionary of values #2171).
  • Add support over AMQP (refactor(iot-device): Merge flows for twin and client property operations #2180).

Microsoft.Azure.Devices 1.35.0-preview-002

• Updates from GA release 2021-08-11.

Microsoft.Azure.Devices.Provisioning.Client 1.18.0-preview-002

• Updates from GA release 2021-08-11.

Microsoft.Azure.Devices.Provisioning.Transport.Mqtt 1.16.0-preview-002

• Updates from GA release 2021-08-11.

Microsoft.Azure.Devices.Provisioning.Transport.Amqp 1.15.0-preview-002

• Updates from GA release 2021-08-11.

Microsoft.Azure.Devices.Provisioning.Client.Transport.Http 1.14.0-preview-002

• Updates from GA release 2021-08-11.

Microsoft.Azure.Devices.Provisioning.Security.Tpm 1.14.0-preview-002

• Updates from GA release 2021-08-11.

Microsoft.Azure.Devices.Provisioning.Service 1.18.0-preview-002

• Updates from GA release 2021-08-11.

[abhipsaMisra]

/azp run

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