add functionality to fetch base backup from wal-e for the new replica creation and code to decide whether to use wal-e or pg_basebackup.
add functionality to fetch base backup from wal-e for the new replica creation and code to decide whether to use wal-e or pg_basebackup.

pgexperts/patroni,sean-/patroni,zalando/patroni,zalando/patroni,jinty/patroni,sean-/patroni,pgexperts/patroni,jinty/patroni