Tracking issue for GSP-749: Unify Path Behavior

[JinnyYi]

• Rendered GSP

Steps

• Update go-storage
  • Update descriptions for work_dir and ID, Path of Object
• Generate code for services that replaces separator with /
• Add test cases in go-integration test
  • Basic operation with absolute path
  • Basic operation with path using different separator
  • Add Object.ID check for the current tests (Not added as in some services ID may be path independent)

Related issues

This issue will solve following discussions.

• Specify the behavior of Path
• OS-specific path separator problem