Clean up `_update_auth_events_and_context_for_auth`#11122

richvdh merged 9 commits intodevelopmatrix-org/synapse:developfrom

rav/unpick_update_auth_events_and_context_for_auth/19_clean_update_auth_events_and_context_for_authmatrix-org/synapse:rav/unpick_update_auth_events_and_context_for_auth/19_clean_update_auth_events_and_context_for_authCopy head branch name to clipboard