fix: improve OAuth token handling for ChainableRamRoleArn and refresh…

[yndu13]

… timing

You need to complete

• unit tests and/or feature tests
• documentation is changed or added

[codecov-commenter]

Codecov Report

❌ Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.41%. Comparing base (7d2a3e6) to head (bf5f7f6).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
credentials/providers/cli_profile.go	81.81%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #153      +/-   ##
==========================================
- Coverage   97.54%   97.41%   -0.14%     
==========================================
  Files          35       35              
  Lines        2807     2820      +13     
==========================================
+ Hits         2738     2747       +9     
- Misses         37       39       +2     
- Partials       32       34       +2     

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