fix: specifying namespace on ops cmds.

[yipeng1030]

fix apecloud/kubeblocks#8478

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 45.45455% with 6 lines in your changes missing coverage. Please review.

Project coverage is 42.66%. Comparing base (9584c24) to head (a8ea2ae).

Files with missing lines	Patch %	Lines
pkg/cmd/cluster/operations.go	45.45%	5 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #490   +/-   ##
=======================================
  Coverage   42.66%   42.66%           
=======================================
  Files         172      172           
  Lines       23276    23276           
=======================================
  Hits         9931     9931           
  Misses      12210    12210           
  Partials     1135     1135           

Flag	Coverage Δ
unittests	42.66% <45.45%> (ø)

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[yipeng1030]

/cherry-pick release-1.0

[github-actions]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kbcli/actions/runs/11910012476