SNOW-1889398: Handle endpoint without protocol for GCS

[sfc-gh-dprzybysz]

Description

SNOW-1889398

Checklist

• Format code according to the existing code style (run npm run lint:check -- CHANGED_FILES and fix problems in changed code)
• Create tests which fail without the change (if possible)
• Make all tests (unit and integration) pass (npm run test:unit and npm run test:integration)
• Extend the types in index.d.ts file (if necessary)
• Extend the README / documentation and ensure is properly displayed (if necessary)
• Provide JIRA issue id (if possible) or GitHub issue id in commit message

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.94%. Comparing base (e8cb18c) to head (3b0c43d).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #994      +/-   ##
==========================================
- Coverage   88.97%   88.94%   -0.03%     
==========================================
  Files          72       72              
  Lines        6985     6985              
==========================================
- Hits         6215     6213       -2     
- Misses        770      772       +2     

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