Updates to S3Client internals to pass extras and more

[pjbull]

Updates a number of issues with S3Client internals, primarily the ability to pass extra_args that may be necessary to a user. This is primarily to address #254 and #180, which require passing extras around at the client level.

The current implementation assumes that all of the upload/download/listing operations will always use the same extras at the level of a client. This is reasonable for most of the extra args except some of the upload ones (Metadata, ContentType, etc.). For the ContentType and ContentEncoding, we already provide a separate means of setting these per-file.

Additionally, we add documentation for RequestPayer explicitly and then ExtraArgs generally.

Bonus:

• Ability to list buckets / containers that the auth'd account has access to #48 listing buckets across providers (and tests)
• Update docs: Use no_sign_request to fix "NoCredentials" Error when trying to access a public S3 bucket #271 Adds an example of a public bucket and caveat that listing permissions may not be available
• Move the super().__init__ calls in the azure objects so that credential errors don't result in additional warnings about missing properties
• Simplify _s3_file_query logic now that API changes make it simpler to tell if something is a file or dir immediately
• Overly specific asserts on S3Client._remove #212 Fix using assert in production code and status code checks that were too specific

Closes #48
Closes #254
Closes #180
Closes #271
Closes #212

[github-actions]

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[codecov-commenter]

Codecov Report

Merging #307 (98dde40) into master (927c038) will decrease coverage by 0.2%.
The diff coverage is 89.1%.

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #307     +/-   ##
========================================
- Coverage    94.5%   94.2%   -0.3%     
========================================
  Files          21      21             
  Lines        1384    1399     +15     
========================================
+ Hits         1309    1319     +10     
- Misses         75      80      +5     

Impacted Files	Coverage Δ
cloudpathlib/gs/gsclient.py	94.3% <80.0%> (-0.7%)	⬇️
cloudpathlib/azure/azblobclient.py	93.8% <83.3%> (-0.7%)	⬇️
cloudpathlib/s3/s3client.py	93.1% <91.1%> (-2.1%)	⬇️
cloudpathlib/local/implementations/azure.py	97.6% <100.0%> (ø)

[pjbull]

Thanks @jayqi !