feat(quaint): remove `json` conditional flag #11016

Job	Run time
Test vitess_5_7 (graphql) on Linux	2m 6s
Test vitess_5_7 (json) on Linux	1m 33s
Test vitess_8_0 (graphql) on Linux	1m 51s
Test vitess_8_0 (json) on Linux	1m 51s
Test postgres15 (graphql) on Linux	13m 4s
Test postgres15 (json) on Linux	13m 44s
Test mssql_2022 (graphql) on Linux	7m 6s
Test mssql_2022 (json) on Linux	9m 25s
Test mongodb_4_2 (graphql) on Linux	3m 20s
Test mongodb_4_2 (json) on Linux	3m 42s
Test cockroach_23_1 (graphql) on Linux	26m 46s
Test cockroach_23_1 (json) on Linux	20m 17s
Test cockroach_22_2 (graphql) on Linux	20m 44s
Test cockroach_22_2 (json) on Linux	23m 6s
Test cockroach_22_1_0 (graphql) on Linux	20m 46s
Test cockroach_22_1_0 (json) on Linux	15m 34s
	3h 4m 55s

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