Make options more const

[DmitriyMusatkin]

Issue #, if available:

Description of changes:
make everything passed in by pointer in options const as we always copy the underlying data.
everything that is ref counted is kept as is, since refcounted functions dont play with const ptrs nicely

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

All modified and coverable lines are covered by tests ✅

Project coverage is 89.62%. Comparing base (813c418) to head (86c4d9a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #445   +/-   ##
=======================================
  Coverage   89.62%   89.62%           
=======================================
  Files          20       20           
  Lines        6092     6092           
=======================================
  Hits         5460     5460           
  Misses        632      632           

[graebm]

I'd advise checking this branch from aws-crt-cpp, and making sure it all works nicely, before merging

[DmitriyMusatkin]

I'd advise checking this branch from aws-crt-cpp, and making sure it all works nicely, before merging

crt cpp actually does not wrap s3 now. i checked cpp sdk and its fine with it. i will check other bindinds