Add storage_variables printer #2285

Job	Run time
tests (ubuntu-latest, unit, 3.8)	58s
tests (ubuntu-latest, unit, 3.12)	46s
tests (ubuntu-latest, integration, 3.8)	3m 2s
tests (ubuntu-latest, integration, 3.12)	3m 15s
tests (ubuntu-latest, tool, 3.8)	1m 0s
tests (ubuntu-latest, tool, 3.12)	58s
tests (windows-2022, unit, 3.8)	2m 1s
tests (windows-2022, unit, 3.12)	1m 52s
tests (windows-2022, integration, 3.8)	2m 44s
tests (windows-2022, integration, 3.12)	3m 30s
tests (windows-2022, tool, 3.8)	2m 12s
tests (windows-2022, tool, 3.12)	3m 24s
coverage	15s
	25m 57s

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