* fix(s3api): fix AWS Signature V2 format and validation
* fix(s3api): Skip space after "AWS" prefix (+1 offset)
* test(s3api): add unit tests for Signature V2 authentication fix
* fix(s3api): simply comparing signatures
* validation for the colon extraction in expectedAuth
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Co-authored-by: chrislu <chris.lu@gmail.com>
