Azure AD - App and users - Add support for password rotation

[LaurentLesle]

This issue adds the password rotation for Azure AD application's service principal and Azure AD users

Examples - examples/azure_ad/102-password-rotation

Need Azure AD permissions to manage users and azure ad apps

Azure AD users. Password auto-created and stored into a keyvault secret

azuread_users = {
  user1 = {
    user_name = "demo-user"
    keyvault_key = "test_client"
    password_policy = {
      # Length of the password
      length  = 250
      special = false
      upper   = true
      number  = true

      # Define the number of days the password is valid. It must be more than the rotation frequency
      expire_in_days = 10
      rotation = {
        #
        # Set the password rotation frequency. When passed the renewal time, running the terraform plan / apply will change to a new password
        # Only set one of the value
        #

        mins   = 1     # only recommended for CI and demo
        # days = 7
        # months = 1
      }
    } //password_policy
  }
}

Azure AD Appplication. Password auto-created and stored into a keyvault secret

azuread_apps = {
  test_client = {
    useprefix        = true
    application_name = "test-client"
    password_policy = {
      # Length of the password
      length  = 250
      special = false
      upper   = true
      number  = true

      # Define the number of days the password is valid. It must be more than the rotation frequency
      expire_in_days = 10
      rotation = {
        #
        # Set the password rotation frequency. When passed the renewal time, running the terraform plan / apply will change to a new password
        # Only set one of the value
        #

        mins   = 2     # only recommended for CI and demo
        # days = 7
        # months = 1
      }
    } //password_policy
    app_role_assignment_required = true
    keyvaults = {
      test_client = {
        secret_prefix = "test-client"
      }
    }
    # Store the ${secret_prefix}-client-id, ${secret_prefix}-client-secret...
    # Set the policy during the creation process of the launchpad
  }
}