Provision a Linux VM as a Bastion jumpbox

[glennmusa]

Benefit/Result/Outcome
I have a Linux machine to remote as part of a Bastion deployment

Description
When I provision a Bastion host using the Bastion module, I expect to provision a Linux virtual machine to use as a jumpbox using linux_virtual_machine

https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/linux_virtual_machine

Acceptance Criteria

• I get this vm when I provision the Bastion host using the Bastion module
• The vm is configured for a valid subnet for bastion jumpboxes in the same virtual network as the bastion subnet
• The login credentials are variable, but generated by MLZ (we can store them later in a KeyVault later in Store virtual machine login credentials in a KeyVault #190)
• The "size" / SKU of the virtual machine is variable, but defaulted by MLZ
• The source image/marketplace image is variable, but defaulted by MLZ