deployment: fix migration job for RDS postgresql 15

[migmartri]

PostgreSQL 15 RDS requires connecting via TLS but our DB migration job disables it (sslmode=disable)

chainloop/deployment/chainloop/templates/_helpers.tpl

Line 185 in 3112af6

{{- printf "postgres://%s:%s@%s:%s/%s?sslmode=disable" (include "controlplane.database.user" .) (include "controlplane.database.escapedPassword" .) (include "controlplane.database.host" .) (include "controlplane.database.port" .) (include "controlplane.database.name" .) }}

We need to either support both modes without requiring user input or allow the user to customize the SSL mode in the Helm Chart values.yaml file

[migmartri]

Closed by #267