codegen: fix `ColumnType` to Rust type resolution (#2313) #4405

Job	Run time
Init	10s
Rustfmt	15s
Examples (examples/actix_example)	2m 20s
Clippy	1m 21s
Unit Test	3m 6s
Examples (examples/axum_example)	2m 18s
Examples (examples/basic)	1m 7s
Examples (examples/graphql_example)	2m 53s
Examples (examples/jsonrpsee_example)	2m 35s
Examples (examples/loco_example)	3m 30s
Examples (examples/loco_starter)	3m 25s
Examples (examples/loco_seaography)	3m 59s
Examples (examples/poem_example)	2m 37s
Examples (examples/proxy_gluesql_example)	1m 22s
Examples (examples/react_admin)	4m 5s
Examples (examples/rocket_example)	3m 3s
Examples (examples/rocket_okapi_example)	3m 9s
Examples (examples/salvo_example)	2m 42s
Examples (examples/seaography_example)	2m 27s
Examples (examples/tonic_example)	2m 23s
Compile MySQL (actix, native-tls)	5m 7s
Compile SQLite (async-std, native-tls)	4m 3s
Compile MySQL (actix, rustls)	5m 8s
CLI	0s
Compile SQLite (async-std, rustls)	4m 58s
Compile PostgreSQL (tokio, native-tls)	5m 11s
Compile PostgreSQL (tokio, rustls)	5m 3s
Issues Matrix	0s
Issues	0s
MariaDB (lts, actix, native-tls)	2s
MySQL (lts, actix, native-tls)	2s
MySQL (5.7, actix, native-tls)	1s
SQLite	1s
Postgres	1s
	1h 18m 24s

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