refs CORE-1813
move it up and generify it so that other providers can use it,
the available keys shown in the UI is driven by the model,
and enable/view it per provider, rather than globally
test plan:
* go to the auth providers page for someone with SAML
* debugging should now be listed under the individual SAML provider,
rather than globally at the bottom of the page
* Click Start Debugging
* in another browser/in cognito window start a login flow
* click refresh on the debugger; it should load more data
* stop debugging should clear it
Change-Id: I28139f8ce289fbd0a4297768b209c0971f833d12
Reviewed-on: https://gerrit.instructure.com/162990
Reviewed-by: Rob Orton <rob@instructure.com>
QA-Review: Jeremy Putnam <jeremyp@instructure.com>
Tested-by: Jenkins
Product-Review: Cody Cutrer <cody@instructure.com>
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