refactor admin : use BearerToken replace StatelessToken for #4496

[plutokaito]

refactor admin : use BearerToken replace StatelessToken for #4496

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Merging #4516 (83d5843) into master (3d8798b) will decrease coverage by 0.03%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##             master    #4516      +/-   ##
============================================
- Coverage     68.44%   68.41%   -0.03%     
+ Complexity     7617     7611       -6     
============================================
  Files          1029     1028       -1     
  Lines         29403    29398       -5     
  Branches       2656     2659       +3     
============================================
- Hits          20125    20113      -12     
- Misses         7685     7694       +9     
+ Partials       1593     1591       -2     

Impacted Files	Coverage Δ
...e/shenyu/admin/shiro/bean/StatelessAuthFilter.java	54.54% <0.00%> (ø)
...g/apache/shenyu/admin/shiro/config/ShiroRealm.java	87.09% <100.00%> (ø)

... and 10 files with indirect coverage changes

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