Feature/pg sslmode

[souvmaju-us]

Adding code to enable TLS certs for sslmode for postgres. Hopefully this can be approved.

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[chungyau97]

Hi @souvikmajumdar @souvmaju-us,

Could you kindly share results of screenshots that it will work with and without TLS certs for sslmode for postgres?

[danieldabate]

Seems like this was already addressed by merged PR #1613, right? Should this PR be closed?