[Error Handling/Codes][State Store] Add ETAG MISMATCH Error Handling

[robertojrojas]

In what area(s)?

/area runtime

Describe the feature

Add ETAG MISMATCH Error Handling following the proposal Error Handling/Codes

Release Note

RELEASE NOTE:

[dapr-bot]

This issue has been automatically marked as stale because it has not had activity in the last 60 days. It will be closed in the next 7 days unless it is tagged (pinned, good first issue, help wanted or triaged/resolved) or other activity occurs. Thank you for your contributions.

[cicoyle]

I think this can be closed due to this error codes issue already existing, with the corresponding state store error codes PR here.

[elena-kolevska]

Etag mismatch is not covered by that PR actually. Once the PR gets merged, we can keep on covering more errors, including this one.

[cicoyle]

I still dont think we should have an issue per error. We will open an issue per API once one of our PRs gets merged, and we can open one to finish the rest of the State API errors 👍🏻