o_direct download support

[TingDaoK]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 64.06250% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.88%. Comparing base (e21f11b) to head (b67ff79).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
source/s3_meta_request.c	68.33%	19 Missing ⚠️
source/s3_auto_ranged_get.c	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #634      +/-   ##
==========================================
- Coverage   89.05%   88.88%   -0.18%     
==========================================
  Files          23       23              
  Lines        7748     7799      +51     
==========================================
+ Hits         6900     6932      +32     
- Misses        848      867      +19     

Files with missing lines	Coverage Δ
source/s3_auto_ranged_get.c	95.20% <0.00%> (-0.98%)	⬇️
source/s3_meta_request.c	90.25% <68.33%> (-0.86%)	⬇️

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