[bitnami/postgresql-repmgr]Add judge primary node ip port is itslef

[kwenzh]

Description of the change

It seems that the judgment of whether the master node IP is your own is missed here.

Updates the Bitnami postgres-repmgr librepmgr.sh , function repmgr_get_primary_node, add judgment of whether the master node IP is your own

Benefits

Optimize extreme abnormal scenarios, such as: cluster machines lose power at the same time, and the restored cluster self-healing

Possible drawbacks

Whether the logic of repmgr itself has been tampered with

Applicable issues

• fix: https://github.com/bitnami/containers/issues/67372

Additional information

I'm happy to change approach if directed to how.

[kwenzh]

@fmulero @carrodher please review this pr

[github-actions[bot]]

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[kwenzh]

refresh