Upgrade to SQLx v0.7 #562

Job	Run time
Unit Test	3m 5s
Rustfmt	16s
Clippy	2m 5s
Compile MySQL (live/mysql)	1m 52s
Compile MySQL (discovery/mysql)	1m 44s
Compile MySQL (writer/mysql)	1m 56s
Compile Postgres (live/postgres)	1m 46s
Compile Postgres (discovery/postgres)	2m 3s
Compile Postgres (writer/postgres)	2m 1s
Compile SQLite (live/sqlite)	1m 55s
Compile SQLite (discovery/sqlite)	1m 31s
Compile SQLite (writer/sqlite)	1m 40s
MariaDB (10.6, live/mysql)	1m 1s
MariaDB (10.6, discovery/mysql)	1m 5s
MariaDB (10.6, writer/mysql)	1m 5s
MySQL (8, live/mysql)	1m 9s
MySQL (8, discovery/mysql)	1m 7s
MySQL (8, writer/mysql)	1m 2s
MySQL (5.7, live/mysql)	1m 8s
MySQL (5.7, discovery/mysql)	1m 4s
MySQL (5.7, writer/mysql)	1m 8s
SQLite (live/sqlite)	36s
SQLite (discovery/sqlite)	18s
SQLite (writer/sqlite)	30s
Postgres (14.4, live/postgres)	1m 6s
Postgres (14.4, discovery/postgres)	1m 31s
Postgres (14.4, writer/postgres)	1m 9s
	36m 53s

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