[ISSUE #9870] Ensure metadata provider cache executors are shutdown correctly

[majialoong]

Which Issue(s) This PR Fixes

Fixes #9870

Brief Description

Ensure that cache executors in metadata providers are properly released to avoid resource leaks.

How Did You Test This Change?

unit test

[codecov-commenter]

Codecov Report

❌ Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.31%. Comparing base (5892de6) to head (a22ea6a).

Files with missing lines	Patch %	Lines
.../provider/LocalAuthenticationMetadataProvider.java	66.66%	0 Missing and 1 partial ⚠️
...n/provider/LocalAuthorizationMetadataProvider.java	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #9871      +/-   ##
=============================================
- Coverage      48.40%   48.31%   -0.10%     
+ Complexity     12288    12260      -28     
=============================================
  Files           1314     1314              
  Lines          93890    93894       +4     
  Branches       12044    12046       +2     
=============================================
- Hits           45449    45361      -88     
- Misses         42834    42907      +73     
- Partials        5607     5626      +19     

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[dingshuangxi888]

LGTM