The response can simply omit fields that require id_token as the only
required field is "active" according to RFC 7662. I think it would be
nice for introspection of client credentials tokens to be supported by
default without needing to override
OIDC_INTROSPECTION_VALIDATE_AUDIENCE_SCOPE, but this is a start.
* Small wording change + fix in example template code
* Added note about UserConsent not being in the admin
* Mostly spelling corrections and phrasing changes
* Moved template context explation from the settings to the templates page
* Changed wording
* Changed wording
