feat: Add Key vault rbac

[pasqualedevita]

List of changes

Motivation and context

Type of changes

• [ ] Add new module
• [ ] Update existing module
• [ ] Remove existing module

Does this introduce a breaking change?

• [ ] Yes
• [ ] No

Other information

from https://github.com/pagopa/terraform-azurerm-v3/pull/39

Run checks

Useful commands to run checks on local machine

bash .utils/terraform_run_all.sh init local
pre-commit run -a

[github-actions[bot]]

:tada: This PR is included in version 4.3.0 :tada:

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