[AVM Question/Feedback]: consider making the host a submodule

[matt-FFFFFF]

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Description

This will allow hosts to be added independently and other dependencies to be added

[chianw]

Hi @matt-FFFFFF - please see if https://github.com/chianw/terraform-azurerm-avm-res-compute-hostgroup/tree/issue60 meets the requirements, is there a need to use a move block or anything like that?