PTEUDO-2041 Support SSL and non-SSL client connections

[drewwells]

The dbproxy is used on the same host as the client. As SSL would
be more secure, we already using SSL to secure the outbound
connection to cloud or actual database. Since this sidecar call
is local to the host, we will allow non-SSL connections. This will
ensure better usability for users of dbproxy.

[drewwells]

DEMO

{"level":"error","ts":"2024-11-13T22:08:28Z","msg":"+ timeout 10 psql 'postgres://localhost:5432/?sslmode=require' -c 'SELECT 1'","stacktrace":"github.com/infobloxopen/db-controller/dbproxy/pgbouncer.run.func3\n\t/workspace/pgbouncer/pgbouncer.go:78\ngithub.com/infobloxopen/db-controller/dbproxy/pgbouncer.run.func1\n\t/workspace/pgbouncer/pgbouncer.go:66"}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":" ?column? "}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":"----------"}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":"        1"}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":"(1 row)"}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":""}
{"level":"error","ts":"2024-11-13T22:08:28Z","msg":"+ timeout 10 psql 'postgres://localhost:5432/?sslmode=disable' -c 'SELECT 1'","stacktrace":"github.com/infobloxopen/db-controller/dbproxy/pgbouncer.run.func3\n\t/workspace/pgbouncer/pgbouncer.go:78\ngithub.com/infobloxopen/db-controller/dbproxy/pgbouncer.run.func1\n\t/workspace/pgbouncer/pgbouncer.go:66"}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":" ?column? "}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":"----------"}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":"        1"}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":"(1 row)"}
{"level":"info","ts":"2024-11-13T22:08:28Z","msg":""}