[Access] Update state stream API to return json-cdc encoded events - backport master

[peterargue]

Closes: #4504

Backports #4533

Updates ExecutionDataAPI to use json-cdc event encoding.

[codecov-commenter]

Codecov Report

Attention: 36 lines in your changes are missing coverage. Please review.

Comparison is base (9c6f9ff) 55.80% compared to head (9660f5f) 55.85%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4803      +/-   ##
==========================================
+ Coverage   55.80%   55.85%   +0.05%     
==========================================
  Files         939      939              
  Lines       86922    86966      +44     
==========================================
+ Hits        48508    48578      +70     
+ Misses      34764    34720      -44     
- Partials     3650     3668      +18     

Flag	Coverage Δ
unittests	55.85% <21.73%> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
engine/common/rpc/convert/execution_data.go	73.36% <66.66%> (-0.30%)	⬇️
engine/access/state_stream/handler.go	38.70% <28.57%> (+38.70%)	⬆️
engine/common/rpc/convert/events.go	62.65% <0.00%> (-10.08%)	⬇️

... and 7 files with indirect coverage changes

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