feat(edge_services): add serverless container backend

[scaleway-bot]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 20 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.32%. Comparing base (ca5b327) to head (21dcd11).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...espaces/edge_services/v1beta1/edge_services_cli.go	0.00%	20 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5192      +/-   ##
==========================================
- Coverage   58.34%   58.32%   -0.02%     
==========================================
  Files         310      310              
  Lines       67907    67927      +20     
==========================================
  Hits        39617    39617              
- Misses      26816    26836      +20     
  Partials     1474     1474              

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