sql/sqlite: allow setting user-defined types #1827

Job	Run time
lint	38s
unit (1.22)	13s
cli	3m 6s
generate-cmp	38s
integration	36s
dialect-integration / integration-mysql56	2m 52s
dialect-integration / integration-mysql8	2m 56s
dialect-integration / integration-maria107	2m 48s
dialect-integration / integration-mysql57	2m 45s
dialect-integration / integration-cockroach	2m 51s
dialect-integration / integration-maria102	2m 54s
dialect-integration / integration-maria103	2m 48s
dialect-integration / integration-postgres10	3m 9s
dialect-integration / integration-postgres11	3m 3s
dialect-integration / integration-postgres13	3m 0s
dialect-integration / integration-postgres12	3m 5s
dialect-integration / integration-postgres14	3m 3s
dialect-integration / integration-postgres15	3m 6s
dialect-integration / integration-postgres-ext-postgis	3m 11s
dialect-integration / integration-sqlite	2m 21s
dialect-integration / integration-tidb5	3m 23s
dialect-integration / integration-tidb6	3m 22s
	55m 48s

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