Web 205 cli command analysis download command is not working

[amiaynara]

Story: https://basepairtech.atlassian.net/browse/WEB-205

Need for the PR

When using the CLI the users are not able to download files/samples that have been shared to them. This is because we are using the directory structure based permission policy when doing aws cp source destination.

Solution

Instead of relying on the permission set by the policy, we will check the permission using the permission methods defined in https://github.com/basepair/webapp/pull/1588/files#diff-f9795f315b679b5b1e2ced76b2291763cfdf9f48fba6dcd284a20c1e258209d4 to check if the user has access (or has been granted the permission by the owner).

Approach

1. whenever a request to dowload a file is created
2. check the permission making the api call to webapp
3. if permission exists, generate the pre-signed url.
4. using that presigned url download the files; instead of using aws cp we will be using requests library to dowload

dependent pr:
https://github.com/basepair/webapp/pull/1588