Print logs when the cluster state changes to fail or the fail reason changes

[enjoy-binbin]

This log allows us to easily distinguish between full coverage and
minority partition when the cluster fails. Sometimes it is not easy
to see the minority partition in a healthy shards (both primary and
replicas).

[codecov]

Codecov Report

Attention: Patch coverage is 92.85714% with 1 line in your changes missing coverage. Please review.

Project coverage is 70.67%. Comparing base (701ab72) to head (5d1380b).
Report is 1 commits behind head on unstable.

Files with missing lines	Patch %	Lines
src/cluster_legacy.c	92.85%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable    #1188      +/-   ##
============================================
+ Coverage     70.47%   70.67%   +0.19%     
============================================
  Files           114      114              
  Lines         61799    63086    +1287     
============================================
+ Hits          43555    44584    +1029     
- Misses        18244    18502     +258     

Files with missing lines	Coverage Δ
src/cluster_legacy.c	86.27% <92.85%> (+0.27%)	⬆️

... and 92 files with indirect coverage changes