(CAT-2539) Test SLES docker containers #156

Job	Run time
Spec / Setup Test Matrix	15s
Spec / Spec tests (Puppet: ~> 8.0, Ruby Ver: 3.2)	28s
Acceptance / Setup Test Matrix	10s
Acceptance / Acceptance tests (SLES-15, puppetcore8-nightly)	3m 58s
	4m 51s

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