Prometheus and grafana port should not be accessible from any address, only myip

[hcoyote]

openmessaging-benchmark/driver-redpanda/deploy/provision-redpanda-aws.tf

Lines 176 to 188 in 8411e4a

	#Prometheus/Dashboard access
	ingress {
	from_port = 9090
	to_port = 9090
	protocol = "tcp"
	cidr_blocks = ["0.0.0.0/0"]
	}
	ingress {
	from_port = 3000
	to_port = 3000
	protocol = "tcp"
	cidr_blocks = ["0.0.0.0/0"]
	}

This should probably be locked down to same address as used for general access to the security group from the tester's home node.

 cidr_blocks = ["${chomp(data.http.myip.body)}/32"]

[hcoyote]

#67 for pr.