Type hint ODL importer classes #8490

Job	Run time
Api Tests (Py 3.8)	9m 41s
Migration Tests	2m 44s
Core Tests (Py 3.8)	9m 10s
Api Tests (Py 3.9)	13m 53s
Core Tests (Py 3.9)	9m 17s
Api Tests (Py 3.10)	17m 13s
Core Tests (Py 3.10)	9m 1s
Api Tests (Py 3.11)	13m 45s
Docker build	1m 32s
Core Tests (Py 3.11)	9m 42s
Docker test circ-scripts (linux/amd64)	1m 20s
Docker test circ-webapp (linux/amd64)	2m 10s
Docker test circ-scripts (linux/arm64)	2m 19s
Docker test circ-webapp (linux/arm64)	3m 35s
Push circ-${{ matrix.image }}	0s
	1h 45m 22s

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