fix: do not cast enum to text within min/max #12181

Job	Run time
Test vitess_8_0 (graphql) on Linux	1m 59s
Test vitess_8_0 (json) on Linux	2m 5s
Test postgres15 (graphql) on Linux	13m 14s
Test postgres15 (json) on Linux	12m 43s
Test mssql_2022 (graphql) on Linux	8m 26s
Test mssql_2022 (json) on Linux	13m 7s
Test sqlite (graphql) on Linux	2m 32s
Test sqlite (json) on Linux	1m 54s
Test mongodb_4_2 (graphql) on Linux	3m 23s
Test mongodb_4_2 (json) on Linux	3m 53s
Test cockroach_23_1 (graphql) on Linux	27m 3s
Test cockroach_23_1 (json) on Linux	32m 2s
Test cockroach_22_2 (graphql) on Linux	23m 7s
Test cockroach_22_2 (json) on Linux	22m 5s
Test cockroach_22_1_0 (graphql) on Linux	21m 24s
Test cockroach_22_1_0 (json) on Linux	32m 20s
	3h 41m 17s

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