cmd/atlas/internal/docker: add pgvector image #2061

Job	Run time
generate-cmp	49s
integration	34s
cli	3m 4s
lint	39s
unit (1.22)	26s
dialect-integration / integration-mysql56	2m 50s
dialect-integration / integration-mysql57	2m 48s
dialect-integration / integration-mysql8	3m 8s
dialect-integration / integration-maria107	2m 52s
dialect-integration / integration-maria102	2m 58s
dialect-integration / integration-maria103	2m 58s
dialect-integration / integration-postgres-ext-postgis	3m 10s
dialect-integration / integration-postgres10	3m 5s
dialect-integration / integration-postgres11	3m 11s
dialect-integration / integration-postgres12	3m 14s
dialect-integration / integration-postgres13	3m 12s
dialect-integration / integration-postgres14	3m 13s
dialect-integration / integration-postgres15	3m 11s
dialect-integration / integration-cockroach	2m 52s
dialect-integration / integration-sqlite	2m 30s
dialect-integration / integration-tidb5	3m 25s
dialect-integration / integration-tidb6	3m 19s
	57m 28s

Provide feedback