Feature/assume role section

[knastase]

What does this PR do?

Attempt to address this issue

• Adds a section to specify STS actions for assuming roles (including SAML and web identity)
• Adds STS section to templates
• Adds tests to check for STS functionality
• Update README with new keys

Special case for STS required hard coding values in the main function which I am not crazy about but one-offs usually call for it. I'm open to suggestions.

I am still not 100% familiar with this code base so if I missed a reference or need an update somewhere please let me know.

What gif best describes this PR or how it makes you feel?

Completion checklist

• Additions and changes have unit tests
• Unit tests, Pylint, security testing, and Integration tests are passing.. GitHub actions does this automatically
• The pull request has been appropriately labeled using the provided PR labels

[kmcquade]

@knasty51 this is 🔥🔥

Can you update the docs to change this? I see that there's some in the Readme but if you could add a markdown file in the docs folder and include it in mkdocs.yml that would be awesome. It definitely helps other users when we can link them to a page dedicated to that functionality.

Thanks so much for your contribution!

[knastase]

I think I updated it in the right spot. Also added it to the doc with a full crud template.