Fix removing role from state if it does not exist

[skatsaounis]

Fix the current provider state which fails to perform plan and also remove from state roles that do not exist anymore.

[github-actions]

In order to lower resource usage and have a faster runtime, PRs will not run Cloud tests automatically. To do so, a Grafana Labs employee must promote the Drone build.

For maintainers, it's better to run only the Cloud tests you need, rather than all of them. You can do so by setting the following parameter when promoting:

TESTARGS='-run=<testname>'

[skatsaounis]

Current state

Error: status: 404, body: {"message":"Role not found","traceID":"123456"}

Expected behavior

Plan succeeds and also removes the deleted role from state.

Reason

The if condition checks for role rather than Role.

[julienduchesne]

Thanks