feat(saml): Enable urn:federation:authentication:windows (#12875)
feat(saml): Enable urn:federation:authentication:windows (#12875)

Refs: ISSUE-275

This should allow users using Microsoft Azure-AD with Windows integrated
authentication to authenticate with SAML to Sentry.
mvaled/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry