feat: Add arc platform support

[qfai]

#255

1. Add a common.InstanceProvider
2. Using CLOUD_PROVIDER environment variable as switch in operator
3. Add arc SDK dependency

follow up

• Local test
• Add unit test
• Add E2E test

[codecov-commenter]

Codecov Report

❌ Patch coverage is 88.88889% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.24%. Comparing base (18cafb0) to head (56e95a9).

Files with missing lines	Patch %	Lines
pkg/cloudprovider/cloudprovider.go	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #260   +/-   ##
=======================================
  Coverage   69.24%   69.24%           
=======================================
  Files           4        4           
  Lines         465      465           
=======================================
  Hits          322      322           
  Misses        123      123           
  Partials       20       20           

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