Upgrade wal-g to 3.0.3 For OrioleDB support

[dfang]

Chore

Describe the chore

wal-g 3.0 is released, we can upgrade it

[olirice]

WAL-G recently added support for the OrioleDB extension so we're going to wait for that release before upgrading to minimize the number of versions we have in production

[olirice]

targeting v3.0.3

[samrose]

An update to wal-g 3 was performed recently. It's usable under the AMI as wal-g-3