Implementation of DaprClient methods into the mock client

[sadath-12]

Describe the solution you'd like

Currently to extend the tests for certain features like stateManager we need to have the complete implementation of mock client method under https://github.com/dapr/go-sdk/blob/main/actor/mock/mock_server.go would be great if we can focus on implementing this first and let any newcomers easily write tests using the mock client

Describe alternatives you've considered

Additional context

[github-actions]

🚀 Issue assigned to you @sadath-12

[mikeee]

Closing as a close relative of #446