Add storage_variables printer #2284

Job	Run time
tests (ubuntu-latest, unit, 3.8)	52s
tests (ubuntu-latest, unit, 3.12)	44s
tests (ubuntu-latest, integration, 3.8)	3m 8s
tests (ubuntu-latest, integration, 3.12)	3m 24s
tests (ubuntu-latest, tool, 3.8)	1m 1s
tests (ubuntu-latest, tool, 3.12)	47s
tests (windows-2022, unit, 3.8)	1m 18s
tests (windows-2022, unit, 3.12)	2m 3s
tests (windows-2022, integration, 3.8)	3m 28s
tests (windows-2022, integration, 3.12)	3m 19s
tests (windows-2022, tool, 3.8)	3m 38s
tests (windows-2022, tool, 3.12)	4m 31s
coverage	18s
	28m 31s

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