Setup terraform structure for connector dev infra for GCP and AWS (#4641)

* setup GCP terraform structure for connector dev infra

* fxes

* Created aws terraform bootstrap infrastructure

* Corrected path for S3 state file

* Creating ssh tunnel testing infrastructure

* Creating a bastion host

* Docs

* Created bastion host with airbyte unprivileged account for tunneling

* Added yum updates

* Create a private subnet and a postgres database within it

* Identifier for db

* Create postgres and bastion within a module.

* Set up postgres infrastructure

* Don't need this terraform wrapper when we run with tfenv

* Dropped incomplete WIP from GCP setup for this PR.

* Touchups to how to use terraform

* Updated to resolve merge conflict

* More separated top level structure to avoid monorepo problems with terraform destroy.

* Clarifying directory structure

* Migrated directory structure for testing infrastructure

Co-authored-by: Jenny Brown <jenny@airbyte.io>

airbyte-integrations/infrastructure/ssh_tunnel/module/sql/postgresql-02-user-create.sql

@@ -0,0 +1,5 @@
+-- create the specific user we want to use from airbyte
+ CREATE
+    USER testcaseuser WITH password 'ThisIsNotTheRealPassword.PleaseSetThisByHand';
+
+GRANT integrationtest_rw TO testcaseuser;