[KYUUBI #7079] Improve performance of AccessRequest initialization

[wForget]

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Why are the changes needed?

Improve performance of authz rules.

Constantize some properties to reduce object creation:

• AccessRequest initialization requires reflection methods
• ~~RuleHelper.ugi~~ (different sparkSession may have different authz ugi)

closes #7079

How was this patch tested?

Was this patch authored or co-authored using generative AI tooling?

No

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 57 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (cad5a39) to head (bb469c7). Report is 21 commits behind head on master.

Files with missing lines	Patch %	Lines
...uubi/plugin/spark/authz/ranger/AccessRequest.scala	0.00%	57 Missing :warning:

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #7081    +/-   ##
=======================================
  Coverage    0.00%   0.00%            
=======================================
  Files         697     700     +3     
  Lines       43203   43457   +254     
  Branches     5854    5887    +33     
=======================================
- Misses      43203   43457   +254     

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