[ISSUE #10271] Fix failover file path.

[YunWZ]

Failover file path should be like {user.home}/naming/{group}/failover/00-00---000-VIPSRV_FAILOVER_SWITCH-000---00-00.

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[codecov-commenter]

Codecov Report

Merging #10272 (b1846c7) into develop (dcb1017) will increase coverage by 0.08%.
The diff coverage is 0.00%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #10272      +/-   ##
=============================================
+ Coverage      52.32%   52.40%   +0.08%     
+ Complexity      5171     5170       -1     
=============================================
  Files            874      874              
  Lines          27757    27757              
  Branches        3073     3073              
=============================================
+ Hits           14524    14547      +23     
+ Misses         11910    11887      -23     
  Partials        1323     1323              

Impacted Files	Coverage Δ
...a/nacos/client/naming/backups/FailoverReactor.java	39.66% <0.00%> (ø)

... and 3 files with indirect coverage changes

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