fix: resolving an error in the inheritance behaviour of notification_configuration and team_access

[marwinbaumannsbp]

Terraform does not treat these variables as an empty map but as tomap({}):

  "baseline-backup-non-prod" = {
    "backup-non-prod" = {
      "arn" = ""
      "notification_configuration" = tomap({})
      "workspace_id" = "ws-cphr4aX68NopxyJA"
      "workspace_name" = "backup-non-prod"
    }

While this behaviour is expected:
> {} != {} ? "additional" : "default"
"default"

This is the actual behaviour:
> tomap({}) != {} ? "additional" : "default"
"additional"

When modifying the input to null this can be resolved, and will still resolve to an empty map because of the defaults in mcaf-workspace. 

[github-actions]

Terraform Format and Style 🖌success

Terraform Initialization ⚙️``

Terraform Lint 📖success

Terraform Validation 🤖success

Validation Output

Success! The configuration is valid.