Allow any S3 verb when creating pre-signed URL

[cartermckinnon]

Description of changes:

Adds the ability create pre-signed S3 URL's for PUT/DELETE/HEAD/etc.

Example:

PRESIGNED_URL=$(aws s3 presign s3://my-bucket/foo.txt --verb put)
curl --upload-file foo.txt $PRESIGNED_URL

PRESIGNED_URL=$(aws s3 presign s3://my-bucket/foo.txt --verb delete)
curl -X DELETE $PRESIGNED_URL

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[cartermckinnon]

The couple of PR checks that failed look like flakes to me 🤷