SQLx

Implement snowflake support via sql api #312

Job	Run time
Format	11s
Unit Test (tokio, rustls)	1m 43s
Check (tokio, rustls)	4m 0s
Check (async-std, rustls)	4m 10s
Check (tokio, native-tls)	3m 55s
CLI Binaries (windows-latest)	2m 2s
Check (async-std, native-tls)	4m 10s
CLI Binaries (ubuntu-latest)	42s
MSSQL	-1s
MariaDB	-1s
Postgres with SSL client cert	-1s
SQLite	-1s
Postgres	-1s
MySQL	-1s
	20m 47s

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