feat: DA EK sharing flow

[anchenyi]

https://msazure.visualstudio.com/Microsoft%20Teams%20Extensibility/_workitems/edit/31547238

[codecov]

Codecov Report

Attention: Patch coverage is 88.13559% with 7 lines in your changes missing coverage. Please review.

Project coverage is 90.30%. Comparing base (3cf945f) to head (ffdac4f).

Files with missing lines	Patch %	Lines
...x-core/src/component/driver/share/shareToOthers.ts	88.13%	2 Missing and 5 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #13284      +/-   ##
==========================================
- Coverage   90.31%   90.30%   -0.01%     
==========================================
  Files         604      605       +1     
  Lines       36040    36099      +59     
  Branches     6991     7160     +169     
==========================================
+ Hits        32549    32601      +52     
- Misses       1514     1516       +2     
- Partials     1977     1982       +5     

Files with missing lines	Coverage Δ
...x-core/src/component/driver/share/shareToOthers.ts	88.13% <88.13%> (ø)