Support full object checksum

[TingDaoK]

Issue #, if available:

• Add support for using crc64nvme as S3 checksum
• Add support for full object checksums.
• For validating checksum, by default, we now prefer to using crc64nvme
• https://aws.amazon.com/blogs/aws/introducing-default-data-integrity-protections-for-new-objects-in-amazon-s3/
• Notes: we don't change our default checksum config for upload, still default to no checksum if no config was provided for checksum.

Description of changes:

• Previously reviewed in https://github.com/awslabs/aws-c-s3-staging/pull/34 and https://github.com/awslabs/aws-c-s3-staging/pull/29
• Don't merge until S3 fully supports the new feature. -> As CRT don't change the default behavior and "most" of our downstream user has its own default checksum setting. CRT can be merged before SDKs.

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

Attention: Patch coverage is 85.18519% with 28 lines in your changes missing coverage. Please review.

Project coverage is 89.52%. Comparing base (45894ed) to head (4df9989).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
source/s3_checksums.c	82.65%	17 Missing ⚠️
source/s3_auto_ranged_put.c	80.64%	6 Missing ⚠️
source/s3_request_messages.c	84.37%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #468      +/-   ##
==========================================
- Coverage   89.64%   89.52%   -0.13%     
==========================================
  Files          20       20              
  Lines        6144     6213      +69     
==========================================
+ Hits         5508     5562      +54     
- Misses        636      651      +15     

Files with missing lines	Coverage Δ
source/s3_checksum_stream.c	74.07% <100.00%> (ø)
source/s3_chunk_stream.c	76.87% <100.00%> (ø)
source/s3_client.c	90.55% <ø> (+0.46%)	⬆️
source/s3_meta_request.c	91.93% <100.00%> (+0.04%)	⬆️
source/s3_util.c	97.15% <100.00%> (+0.01%)	⬆️
source/s3_request_messages.c	74.50% <84.37%> (-0.27%)	⬇️
source/s3_auto_ranged_put.c	92.22% <80.64%> (-0.57%)	⬇️
source/s3_checksums.c	85.78% <82.65%> (-3.98%)	⬇️

[graebm]

LGTM (previously reviewed in private repo)