.Net: SK Process Cloud Events - Publish Interface abstraction in DAPR

[esttenorio]

Motivation and Context

Initial change need for Cloud Event support, in particular the publishing events scenario.

This initial change only include initial plumping to make it work in SK process with Dapr.

Coming up changes in separate PRs:

• Equivalent plumbing in LocalRuntime
• New abstractions to be used when creating sk ProcessBuilder
• Samples/Demos with usage

Description

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄