Ability overriding `resource_group` globally
## Description
We using `parallel.matrix`, plan, apply and destroy jobs cannot run parallely since the default `resource_group: <env>/$CI_COMMIT_REF_NAME` is present.
Since I'm using `parallel.matrix` to apply multiple services independently with the ability to apply only part of the services (in case only some changed), I would like to be able to override globally `resource_group` (to affect all concerned jobs).
## Implementation ideas
Add a new input with its associated environment variable defining the resource_group name (for instance `TF_RESOURCE_GROUP` and `tf-resource-group`).
By default it would stay `<env>/$CI_COMMIT_REF_NAME`.
It should work without issue with the environment variable, however I'm not sure that providing such input `resource-group: <env>/$CI_COMMIT_REF_NAME` will work 🤔.
I don't have a specific point of view between one input for all environments (we can use $ENV_TYPE to have a different resource_group per job) and one input per environment.
Open to provide the implementation if we agree on this feature.
issue