rename CopyR to Fetch

[fengxsong]

rename function name.

🤖 Generated by Copilot at 15029e9

Summary

🔁🔄🗑️

Renamed and refactored the CopyR method to Fetch in the pkg/ssh package and its dependencies. This change improves the clarity and consistency of the file copying functionality and removes an unused dependency.

Sing, O Muse, of the skillful refactorer who changed the code
Of the clusterClient and the RemoteCmd, the swift and the bold
Who renamed the CopyR method to Fetch, as clear as the sun
And made it fetch remote files to local, like Hermes the cunning

Walkthrough

• Rename CopyR method to Fetch and swap parameters for clusterClient, Client, and Interface types (link, link, link)
• Refactor Fetch method implementation to use better variable names, error handling, and io.Copy function (link)
• Simplify logging statements in Fetch method to use logger package instead of logrus (link)
• Remove unused logrus import from scp.go (link)
• Update RemoteCmd type to use Fetch method and swap parameters in test/e2e/testhelper/cmd/cmd.go (link)

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (db9c47d) 72.30% compared to head (15029e9) 72.30%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3061   +/-   ##
=======================================
  Coverage   72.30%   72.30%           
=======================================
  Files           8        8           
  Lines         603      603           
=======================================
  Hits          436      436           
  Misses        132      132           
  Partials       35       35           

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