[Feature Request]: default_labels at provider level to tag all ressources that support it

[saimonn]

What feature would you like to have in the provider?

This would allow to tag all ressources from a workspace in a single place.

eg.:

 provider "exoscale" {
  key = "EXOxxxxxxxxxxxxxxxxxxxxxxxx"
  secret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

  default_labels {
    tf_repo = "https://example.org/my-iac-repo/paf"
    tf_workspace = terraform.workspace
  }
}