[no-release-notes] go: sqle/cluster: commithook: Create a sql session and make lifecycle callbacks when accessing srcDB. #8816
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As part of GC safepoint establishment, we need lifecycle callbacks around all the places we access the database. This PR adds those callbacks to the cluster replication commithook.
Lifecycle on registering the commit hooks on the database versus creating the SqlEngine instance is a little wonky. Concretely, we register the hooks before we create the SqlEngine, but we we change things so that we start running them after the SqlEngine is created and can supply the appropriate factory for the sql.Context.