Restore the winery postgresql replication

Following #5270

Took the opportunity to document the process

added platform::CEA label

marked this issue as related to #5270

added priority:High label

changed title from Restore the postgresql replication to Restore the winery postgresql replication

assigned to @vsellier

mentioned in commit vsellier/swh-docs@ea920c2e

FTR the replication was restored and the HOWTO written in the documentation.

Waiting for the doc to land before closing this issue

mentioned in commit vsellier/swh-docs@a39883fb

mentioned in commit vsellier/swh-docs@ad7b3adf

mentioned in commit vsellier/swh-docs@408fb430

doc landed

closed