Add internal-use Access Tokens to Developer Keys section in the Admin Account

[ember_ludwig]

Currently Access Tokens are associated with a specific user and that user's specific permissions.  When using the APIs to provision courses and enrollments, it would be useful and more secure to have the same control over permissions and clusters (beta/test vs production/all) that Developer Keys have. 

When conferring with a consultant at Instructure, he said we should just use the Access Token and not the Developer Keys as they were for third-parties.  However, the Developer Keys provide the security we'd like to have for our internal development.

Thank you,

Ember

[ProductPanda]

Comments from Instructure

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