[DOC] Add Documentation for Spark AuthZ Extension

[yaooqinn]

Why are the changes needed?

How was this patch tested?

• Add some test cases that check the changes thoroughly including negative and positive cases if possible

• Add screenshots for manual tests if appropriate

• Run test locally before make a pull request

[codecov-commenter]

Codecov Report

Merging #2395 (109440b) into master (1a58aaf) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #2395      +/-   ##
============================================
- Coverage     62.72%   62.70%   -0.02%     
  Complexity       69       69              
============================================
  Files           360      360              
  Lines         17137    17137              
  Branches       2311     2311              
============================================
- Hits          10749    10746       -3     
- Misses         5380     5381       +1     
- Partials       1008     1010       +2     

Impacted Files	Coverage Δ
...ugin/spark/authz/ranger/RangerSparkExtension.scala	100.00% <ø> (ø)
...rg/apache/kyuubi/engine/trino/TrinoStatement.scala	66.66% <0.00%> (-2.30%)	⬇️
...in/scala/org/apache/kyuubi/config/KyuubiConf.scala	96.30% <0.00%> (-0.13%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1a58aaf...109440b. Read the comment docs.

[ulysses-you]

thanks, merging to master