Add tests for adding multiple LWCAs #4624

Job	Run time
Building ACME images	5m 12s
Publishing ACME images	0s
ACME with postgresql back-end / Test	5m 7s
ACME container / Test	1m 24s
ACME with certbot / Test	3m 58s
ACME server switchover / Test	3m 58s
	19m 39s

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