[crmsh-4.6] Dev: log an error when fencing node without stonith device configured and running

[liangxin1300]

backport #1425

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 53.11%. Comparing base (37a1c4e) to head (7fc75ba).
Report is 2 commits behind head on crmsh-4.6.

Files	Patch %	Lines
crmsh/crash_test/task.py	0.00%	3 Missing ⚠️
crmsh/ui_node.py	0.00%	3 Missing ⚠️
crmsh/crash_test/utils.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##           crmsh-4.6    #1426      +/-   ##
=============================================
- Coverage      53.12%   53.11%   -0.02%     
=============================================
  Files             79       79              
  Lines          23974    23985      +11     
=============================================
+ Hits           12737    12739       +2     
- Misses         11237    11246       +9     

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