Make hetzner terraform manifests for gemini and devnet

[DaMandal0rian]

Currently, we deploy networks with AWS on terraform, but we are migrating some infra to hetzner to balance/split the network, thus need automation to handle this.

Tasks

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1. create one module for hetzner
2. make child module for devnet and gemini networks
3. make ephemeral testing child module

[DaMandal0rian]

waiting on #263 to be reviewed and will start this