cbbackupmgr is trying to connect on non-TLS port 9102 when taking backup

Steps to reproduce:

1. Create a 4 node cluster kv-index-index-n1ql and load all sample buckets
2. Enable N2N encryption and set TLS level to strict

   ./couchbase-cli setting-autofailover -c localhost:8091 -u Administrator -p password --enable-auto-failover=0

   ./couchbase-cli node-to-node-encryption -c localhost:8091 -u Administrator -p password --enable

   curl -v -X POST -u Administrator:password http://10.112.205.101:8091/internalSettings -d 'canEnableStrictEncryption=true'

   curl -v -u Administrator:password -X POST http://localhost:8091/settings/security -d 'clusterEncryptionLevel=strict'

1. Create back repository using cbbackupmgr and create backup

   [root@node1-cb660-centos7 ~]# /opt/couchbase/bin/cbbackupmgr config --archive /data/backups --repo example

   Backup repository `example` created successfully in archive `/data/backups`[root@node1-cb660-centos7 ~]# /opt/couchbase/bin/cbbackupmgr backup -c 127.0.0.1 -u Administrator -p password -a /data/backups -r example

   Backing up to '2021-12-15T07_39_02.94611836Z'

   Transferring GSI indexes for 'beer-sample'                                                                                                                                                                                                   0 items / 0B

   [===============================================================================================================================================================================================================================================] 100.00%

   Error backing up cluster: Indexer error: dial tcp 10.112.205.101:9102: connect: connection refused

1. cbbackupmgr is connecting on non-TLS port, i.e 9102