fixed on conflict do nothing for MySQL #1886

Job	Run time
Build `sea-query-postgres`	1m 30s
Build `sea-query-binder` (async-std, rustls)	3m 48s
Build `sea-query`	1m 17s
Clippy	2m 4s
Build `sea-query-rusqlite`	59s
Rustfmt	28s
Unit Test	2m 57s
Derive Tests	1m 25s
MySQL (8, sqlx_mysql)	1m 45s
MySQL (5.7, sqlx_mysql)	1m 42s
PostgreSQL (14.4, postgres)	1m 24s
PostgreSQL (14.4, sqlx_postgres)	2m 13s
PostgreSQL (13.7, postgres)	1m 29s
PostgreSQL (13.7, sqlx_postgres)	1m 41s
PostgreSQL (12.11, postgres)	1m 22s
PostgreSQL (12.11, sqlx_postgres)	2m 16s
MariaDB (10.6, sqlx_mysql)	1m 58s
Any	2m 6s
SQLite (rusqlite)	42s
SQLite (sqlx_sqlite)	1m 12s
	34m 18s

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