Wire up 'create account' to the SSO button when SSO is used
Wire up 'create account' to the SSO button when SSO is used

For https://github.com/vector-im/riot-web/issues/12362
matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk