FieldBlock: add test proving options are constructed and passed down #112

Job	Run time
test-postgres-elasticsearch6 (3.8, Django>=3.2,<3.3)	9m 58s
test-mysql (3.8, Django>=3.2,<3.3, false)	29m 52s
test-mysql (3.10, Django>=4.2,<4.3, false, --parallel)	16m 31s
test-postgres (3.8, Django>=3.2,<3.3, false, --parallel)	14m 24s
test-postgres (3.11, Django>=4.2,<4.3, postgres:12, notz, false, --parallel)	12m 26s
test-postgres (3.10, Django>=4.1,<4.2, false, emailuser, --parallel)	12m 23s
test-postgres (3.10, git+https://github.com/django/django.git@stable/4.2.x#egg=Django, true, post...	22m 33s
test-postgres (3.10, git+https://github.com/django/django.git@main#egg=Django, true, postgres:12,...	14m 48s
test-postgres-elasticsearch7 (3.8, Django>=4.1,<4.2, false)	8m 45s
test-sqlite (3.9, Django>=4.1,<4.2)	14m 7s
test-sqlite-elasticsearch5 (3.8, Django>=3.2,<3.3)	10m 42s
test-sqlite-elasticsearch8 (3.10, Django>=4.2,<4.3, emailuser)	8m 12s
coverage	1m 9s
	2h 55m 50s

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