Dev: bootstrap: Refine remote_auth stage

[liangxin1300]

• Rename init_remote_auth to generate_pacemaker_remote_auth, call it in cluster stage
• In check_stage_dependency, don't check if the stage is internal or not, just check if the stage check function returns True

Fix #1593

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.24%. Comparing base (94635ab) to head (6d9a66c).
Report is 4 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
integration	54.51% <100.00%> (-0.01%)	⬇️
unit	52.13% <40.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
crmsh/bootstrap.py	88.66% <100.00%> (-0.03%)	⬇️

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