Replace `addfinalizer` uses with yield fixtures #373

Job	Run time
deploy	0s
test (linting,docs, 3.11, false)	39s
test (py311-dj42-postgres-xdist-coverage, 3.11, false)	2m 37s
test (py310-dj41-postgres-xdist-coverage, 3.10, false)	2m 56s
test (py310-dj32-postgres-xdist-coverage, 3.10, false)	2m 47s
test (py311-dj41-mysql_innodb-coverage, 3.11, false)	2m 20s
test (py310-dj42-mysql_innodb-coverage, 3.10, false)	3m 2s
test (py39-dj32-mysql_innodb-xdist-coverage, 3.9, false)	2m 31s
test (py38-dj41-sqlite-xdist-coverage, 3.8, false)	2m 13s
test (py38-dj32-sqlite-xdist-coverage, 3.8, false)	2m 23s
test (py310-djmain-sqlite-coverage, 3.10, true)	2m 8s
test (py38-dj32-mysql_myisam-coverage, 3.8, false)	2m 28s
test (py38-dj32-sqlite-pytestmin-coverage, 3.8, false)	2m 8s
test (pypy3-dj32-postgres, pypy3.9, false)	3m 15s
	31m 27s

Provide feedback