Use CryptoApi.getKeyBackupInfo instead of deprecated MatrixClient.getKeyBackupVersion#28450

florianduros merged 4 commits intodevelopelement-hq/element-web:developfrom

florianduros/rip-out-legacy-crypto/migrate-getBackupVersionelement-hq/element-web:florianduros/rip-out-legacy-crypto/migrate-getBackupVersionCopy head branch name to clipboard