Ensure that prometheus data directory exists, prometheus does not create #808

Job	Run time
kitchen / prepare-matrix	2s
kitchen / run-kitchen-tests (centos-stream-9)	2m 49s
kitchen / run-kitchen-tests (ubuntu-2204)	1m 57s
kitchen / run-kitchen-tests (fedora-40)	1m 57s
kitchen / run-kitchen-tests (ubuntu-2404)	1m 58s
kitchen / run-kitchen-tests (debian-12)	1m 45s
kitchen / run-kitchen-tests (centos-stream-10)	2m 6s
	12m 34s

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