Add StateVariable location #2013

Job	Run time
tests (ubuntu-latest, unit, 3.8)	55s
tests (ubuntu-latest, unit, 3.12)	56s
tests (ubuntu-latest, integration, 3.8)	3m 2s
tests (ubuntu-latest, integration, 3.12)	3m 14s
tests (ubuntu-latest, tool, 3.8)	1m 5s
tests (ubuntu-latest, tool, 3.12)	55s
tests (windows-2022, unit, 3.8)	1m 39s
tests (windows-2022, unit, 3.12)	1m 39s
tests (windows-2022, integration, 3.8)	2m 40s
tests (windows-2022, integration, 3.12)	2m 36s
tests (windows-2022, tool, 3.8)	2m 30s
tests (windows-2022, tool, 3.12)	2m 35s
coverage	17s
	24m 3s

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