mysql: `ColumnType::Year` changed #629

Job	Run time
Compile Postgres (live/postgres)	1m 12s
Compile MySQL (live/mysql)	1m 12s
Clippy	59s
Compile Postgres (discovery/postgres)	1m 6s
Compile MySQL (discovery/mysql)	1m 8s
Compile SQLite (live/sqlite)	1m 6s
Compile Postgres (writer/postgres)	1m 2s
Compile SQLite (discovery/sqlite)	1m 4s
Compile MySQL (writer/mysql)	1m 8s
Rustfmt	10s
Compile SQLite (writer/sqlite)	55s
Unit Test	1m 19s
SQLite (live/sqlite)	12s
SQLite (discovery/sqlite)	10s
SQLite (writer/sqlite)	14s
MariaDB (10.6, live/mysql)	47s
MySQL (8, live/mysql)	45s
MariaDB (10.6, discovery/mysql)	51s
MySQL (8, discovery/mysql)	53s
MariaDB (10.6, writer/mysql)	35s
MySQL (8, writer/mysql)	54s
MySQL (5.7, live/mysql)	1m 3s
MySQL (5.7, discovery/mysql)	1m 9s
MySQL (5.7, writer/mysql)	37s
Postgres (14.4, live/postgres)	58s
Postgres (14.4, discovery/postgres)	54s
Postgres (14.4, writer/postgres)	1m 19s
	23m 42s

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