feat(breaking-change): ACNA-2584 - add Adobe App Builder State Store

[shazron]

This is a breaking change. The CosmosDB State Store has been removed, and we will be using our own State Store.
Note for put, the new restriction is we can only push strings, not any other types like objects.

The change has been designed to be "drop in" for existing users, so they won't need to change their code except if they have been pushing non-string data to the state store, they will have to stringify their values now.

How Has This Been Tested?

• npm test
• e2e tests (using the adp-state-storage local server)

MERGING NOTES (DO NOT MERGE UNTIL COMPLETED)

• The prod and stage endpoints have not been finalized, there are placeholder urls in lib/constants.js
• [ ] The Adobe AB State Store has been released to production the main branch is the aio-lib-state next release. The old release is in the 2.x branch

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ef5aa34) 100.00% compared to head (7cf0bf1) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #135   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            6         6           
  Lines          173       165    -8     
  Branches        36        29    -7     
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- Hits           173       165    -8     

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[shazron]

wait for #136