[BUG] Attempt to skip IMDS if region or credentials are provided

[samster25]

This should fix issues if the user provides a region and the sdk still attempts to grab region info from the provider which shows up as the following issue:

failed to load region from IMDS err=failed to load IMDS session token

This should also fix our IMDSv2 credential timeout issue we see on EKS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (74591c1) 85.50% compared to head (65a41b8) 85.48%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1886      +/-   ##
==========================================
- Coverage   85.50%   85.48%   -0.02%     
==========================================
  Files          55       55              
  Lines        6194     6194              
==========================================
- Hits         5296     5295       -1     
- Misses        898      899       +1     

see 1 file with indirect coverage changes