pgbouncer: Use new bitnamilegacy container registry

See merge request !8152



Merged-by: Olivier Campeau <ocampeau@gitlab.com>
Approved-by: John Cai <jcai@gitlab.com>
Approved-by: Eric Ju <eju@gitlab.com>


(cherry picked from commit 4d78df8c)

c0811274 pgbouncer: Use new bitnamilegacy container registry

Co-authored-by: Olivier Campeau <ocampeau@gitlab.com>

pgbouncer: Use new bitnamilegacy container registry (18.4 backport)

See merge request !8221



Merged-by: Mayra Cabrera <mcabrera@gitlab.com>
Approved-by: Olivier Campeau <ocampeau@gitlab.com>
Co-authored-by: Niklas van Schrick <mc.taucher2003@gmail.com>

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