wip: sts: interceptor in sts with cw client

[sandeepvinayak]

Summary

< Provide a brief description of the changes in this PR >

Some conventions to follow

1. add the module name as a prefix
   • for example: add a prefix: docstore: for document store module, blobstore for Blob Store module
2. for a test only PR, add test:
3. for a perf improvement only PR, add perf:
4. for a refactoring only PR, add "refactor:"

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 38 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.71%. Comparing base (c8e737f) to head (195406d).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
...ticloudj/common/aws/StsDiagnosticsInterceptor.java	0.00%	34 Missing ⚠️
...ava/com/salesforce/multicloudj/sts/aws/AwsSts.java	0.00%	4 Missing ⚠️

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #315      +/-   ##
============================================
+ Coverage     81.21%   81.71%   +0.49%     
- Complexity      422      519      +97     
============================================
  Files           180      182       +2     
  Lines         10508    10849     +341     
  Branches       1338     1404      +66     
============================================
+ Hits           8534     8865     +331     
- Misses         1336     1340       +4     
- Partials        638      644       +6     

Flag	Coverage Δ
unittests	81.71% <0.00%> (+0.49%)	⬆️

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