Add streaming fileobj support to CRTTransferManager

[graebm]

Improvements to CRTTransferManager:

• Add streaming fileobj support
  • Previously, it only worked with file paths.
• Add support for ChecksumAlgorithm
• Use ALLOWED lists to limit what can be passed in extra_args
  • The default TransferManager uses these lists to prevent unexpected weirdness when splitting uploads and downloads into parts, but the CRTTransferManager hadn't hooked up these filters

This relies on awscrt 0.19.4+
We'll need to update botocore's dependencies, before this can go in.

[graebm]

Should I make a common base class for TransferManager and CRTTransferManager, where I can put stuff like these lists, and def _validate_all_known_args() and def _validate_if_bucket_supported()?

Or move these to be standalone lists/functions that both classes can use?

Or just copy/paste the functions, and reference the lists, like I'm doing here?

[graebm]

This is different than the default TransferManager. With this change CRT is defaulting to CRC32 instead of Content-MD5. The CRT team got grumpy about how Content-MD5 currently works in our code and pushed me to do it this way, but we can still make Content-MD5 work if we need to.