CI: test resources race condition

[r-vasquez]

When running CI in 2 different PRs you may encounter the following message if one of the jobs fails to teardown the test cluster:

╷
│ Error: Error creating InstanceGroup: googleapi: Error 409: The resource 'projects/[PROJECTNAME]/zones/us-west2-a/instanceGroups/ci-fd-bs-rp-group' already exists, alreadyExists
│
│   with module.redpanda-cluster.google_compute_instance_group.broker[0],
│   on .terraform/modules/redpanda-cluster/cluster.tf line 63, in resource "google_compute_instance_group" "broker":
│   63: resource "google_compute_instance_group" "broker" {
│
╵

[r-vasquez]

Same in AWS:

│ Error: creating Security Group (rp-basic-ub-node-sec-group): InvalidGroup.Duplicate: The security group 'rp-basic-ub-node-sec-group' already exists for VPC 'vpc-[redacted]'
│ 	status code: 400, request id: [redacted]'
│
│   with module.redpanda-cluster.aws_security_group.node_sec_group,
│   on aws/modules/redpanda-cluster/network.tf line 1, in resource "aws_security_group" "node_sec_group":
│    1: resource "aws_security_group" "node_sec_group" {
│