Dev: ui_cluster: Add firewalld stage to crm cluster init help info

[liangxin1300]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.30%. Comparing base (2e297cf) to head (03c6269).
Report is 3 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
integration	54.52% <ø> (ø)
unit	52.95% <ø> (ø)

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Files with missing lines	Coverage Δ
crmsh/ui_cluster.py	74.34% <ø> (ø)

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