v5.x - Remove folly::Expected usage.

[szmyd]

No description provided.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 50.94340% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.98%. Comparing base (0262682) to head (237883d).
⚠️ Report is 82 commits behind head on main.

Files with missing lines	Patch %	Lines
src/lib/factory.cpp	16.66%	6 Missing and 4 partials ⚠️
src/lib/manager_impl.cpp	50.00%	6 Missing and 1 partial ⚠️
src/lib/service.cpp	45.45%	5 Missing and 1 partial ⚠️
src/proto/proto_mesg_factory.cpp	70.00%	1 Missing and 2 partials ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #138      +/-   ##
==========================================
- Coverage   71.47%   70.98%   -0.49%     
==========================================
  Files          21       20       -1     
  Lines         887      941      +54     
  Branches      103      115      +12     
==========================================
+ Hits          634      668      +34     
- Misses        188      193       +5     
- Partials       65       80      +15     

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