Exposes a new argument to authentication strategies which allows the
author to determine if this auth strategy has the capability of setting
response headers or not.
This is useful because some auth strategies may want to set headers, but
in Next.js server components (AKA the admin panel), it's not possible to
set headers. It is, however, possible to set headers within API
responses and similar contexts.
So, an author might decide to only run operations that require setting
headers (i.e. refreshing an access token) if the auth strategy is being
executed in contexts where setting headers is possible.
ca6f849b53