hook for inputs2outputs should not process sensitive variables

[tbugfinder]

In case a module requires sensitive inputs (worst case passwords) then those shouldn't be added to the inputs2outputs.tf file.
It was also considered to set inputs2outputs overall with sensitive = true however this would also require the same setting for all outputs within this chain.

Therefore the proposal is to skip variables which have sensitive = true.
Easiest approach would be native support by terraform-docs.

[tbugfinder]

A quick workaround is skipping keys using jq based on the key name.

$ terraform-docs tfvars json . | jq -r 'with_entries(select(.key | contains("password")|not))'
{
  "id": null,
  "itags": {},
  "name": null
}


$ terraform-docs tfvars json . | jq -r 'with_entries(select(.key | contains("password") or contains ("itags") |not))'
{
  "id": null,
  "name": null
}