Remove configuration storage classes. #8365

Job	Run time
Api Tests (Py 3.8)	9m 42s
Migration Tests	3m 32s
Core Tests (Py 3.8)	10m 22s
Api Tests (Py 3.9)	9m 11s
Core Tests (Py 3.9)	10m 39s
Api Tests (Py 3.10)	9m 6s
Core Tests (Py 3.10)	8m 58s
Api Tests (Py 3.11)	9m 22s
Docker build	1m 54s
Core Tests (Py 3.11)	9m 42s
Docker test circ-scripts (linux/amd64)	1m 51s
Docker test circ-webapp (linux/amd64)	1m 44s
Docker test circ-scripts (linux/arm64)	3m 22s
Docker test circ-webapp (linux/arm64)	4m 10s
Push circ-scripts	1m 27s
Push circ-webapp	1m 23s
Push circ-exec	1m 35s
	1h 38m 0s

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