[Dependencies] Add cryptography backend for python-jose

[judysng]

Changes

• Use python-jose[cryptography] instead of just python-jose to use the cryptography backend instead of ecdsa backend
  • Doing this because of this CVE for edcsa that they don't intend to fix: https://github.com/aws/aws-parallelcluster-ui/security/dependabot/29
  • ecdsa will still be installed, but will be unused, since cryptography will be used instead: https://pypi.org/project/python-jose/

How Has This Been Tested?

Ran pytest, deployed, created/deleted cluster

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[gmarciani]

Installing python-jose with a specific backend was a very good approach to bypass the edcsa CVE. Good job!