Make all BatchUtils variables to be final

[gabry-lab]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (aadf866) to head (1408173).

Files with missing lines	Patch %	Lines
...java/org/apache/kyuubi/client/util/BatchUtils.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #7215   +/-   ##
======================================
  Coverage    0.00%   0.00%           
======================================
  Files         696     696           
  Lines       43544   43537    -7     
  Branches     5891    5891           
======================================
+ Misses      43544   43537    -7     

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[pan3793]

Thanks, merged to master