tests

Let `last_insert_id` optional and flexible. #4686

Job	Run time
Clippy	1m 19s
Init	6s
Unit Test	3m 7s
Rustfmt	20s
Examples (examples/axum_example)	2m 23s
Examples (examples/loco_example)	3m 10s
Examples (examples/loco_starter)	3m 31s
Examples (examples/poem_example)	2m 21s
Examples (examples/actix_example)	2m 27s
Examples (examples/react_admin)	4m 13s
Examples (examples/graphql_example)	2m 30s
Examples (examples/salvo_example)	2m 35s
Examples (examples/rocket_okapi_example)	3m 0s
Examples (examples/rocket_example)	3m 4s
Examples (examples/loco_seaography)	4m 27s
Examples (examples/jsonrpsee_example)	2m 33s
Examples (examples/tonic_example)	2m 25s
Examples (examples/seaography_example)	2m 30s
Examples (examples/basic)	1m 12s
Examples (examples/proxy_gluesql_example)	2m 35s
Compile SQLite (async-std, rustls)	2m 32s
Compile PostgreSQL (tokio, rustls)	2m 36s
Compile MySQL (actix, native-tls)	2m 26s
Compile SQLite (async-std, native-tls)	2m 54s
Compile PostgreSQL (tokio, native-tls)	2m 33s
Compile MySQL (actix, rustls)	2m 55s
CLI	-1s
Issues Matrix	-1s
Issues	-1s
MySQL (5.7, actix, native-tls)	3m 31s
MariaDB (lts, actix, native-tls)	2m 48s
MySQL (lts, actix, native-tls)	4m 10s
Postgres (14, tokio, native-tls)	6m 59s
Postgres (16, tokio, native-tls)	7m 24s
SQLite (async-std, rustls)	4m 15s
SQLite (async-std, native-tls)	4m 25s
	1h 39m 13s

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