tests

CI: run all examples on a single instance #4649

Job	Run time
Clippy	1m 9s
Examples	44m 5s
Init	3s
Rustfmt	26s
Unit Test	3m 11s
Compile SQLite (async-std, native-tls)	2m 20s
Compile PostgreSQL (tokio, native-tls)	2m 21s
CLI	0s
Compile SQLite (async-std, rustls)	2m 24s
Compile PostgreSQL (tokio, rustls)	2m 24s
Compile MySQL (actix, native-tls)	2m 21s
Compile MySQL (actix, rustls)	2m 23s
Issues Matrix	0s
Issues	0s
SQLite (async-std, native-tls)	4m 7s
SQLite (async-std, rustls)	4m 23s
Postgres (14, tokio, native-tls)	6m 37s
Postgres (16, tokio, native-tls)	6m 27s
MySQL (lts, actix, native-tls)	3m 14s
MariaDB (lts, actix, native-tls)	2m 16s
MySQL (5.7, actix, native-tls)	3m 6s
	1h 33m 17s

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