Add coherence state store component - updated

[tmiddlet2666]

Description

Added a new implementation for a Coherence state store component.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: #[issue number]

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation / Created issue in the https://github.com/dapr/docs/ repo: Document new coherence state store component docs#4661

[tmiddlet2666]

Hi @JoshVanL @daixiang0
Creating this new PR to replace the old one which i will close.
There were too many conflicts in my manual merge

[tmiddlet2666]

Hi @JoshVanL @daixiang0
Anything more i need to do here, thanks?

[nelson-parente]

overall lgtm! added some nits

[tmiddlet2666]

Thanks @nelson-parente
I have pushed updated code to address review comments.

[tmiddlet2666]

@JoshVanL @daixiang0
Please let me know if any more changes are required now @nelson-parente has approved
Thanks

[tmiddlet2666]

Any more changes required here? Can we can this approved and merged please?
Thanks

[cicoyle]

one typo nit, but otherwise lgtm

[yaron2]

@tmiddlet2666 Please follow up with a docs PR to add this to our docs. See an example here: dapr/docs#4691

[tmiddlet2666]

@tmiddlet2666 Please follow up with a docs PR to add this to our docs. See an example here: dapr/docs#4691

Thanks @yaron2
I have created a doc issue for my previous PR dapr/docs#4661
Will look at the above example.
Thanks