[DPE-10368] Bump replication lag defaults from 16kB to 100MB (#1760) (#1763)

Otherwise the systems with heavy writes might never joining the
cluster reporting back `awaiting for member to start`.

(cherry picked from commit 53c574e)

Author: taurus-forever

src/cluster.py

@@ -482,7 +482,7 @@ def is_replication_healthy(self, raft_encryption: bool = False) -> bool:
                     members_ips = {self.unit_ip}
                     members_ips.update(self.peers_ips)
                     for members_ip in members_ips:
-                        endpoint = "leader" if members_ip == primary_ip else "replica?lag=16kB"
+                        endpoint = "leader" if members_ip == primary_ip else "replica?lag=100MB"
                         url = self._patroni_url.replace(self.unit_ip, members_ip)
                         member_status = requests.get(
                             f"{url}/{endpoint}",