Drop the use of `rust_decimal_macros` #4033

Job	Run time
Unit Test	3m 13s
Init	3s
Clippy	1m 18s
Examples (examples/actix_example)	2m 55s
Rustfmt	18s
Examples (examples/actix3_example)	2m 47s
Examples (examples/axum_example)	2m 31s
Examples (examples/basic)	1m 9s
Examples (examples/graphql_example)	2m 51s
Examples (examples/jsonrpsee_example)	2m 41s
Examples (examples/poem_example)	2m 16s
Examples (examples/proxy_gluesql_example)	1m 17s
Examples (examples/rocket_example)	3m 20s
Examples (examples/salvo_example)	2m 40s
Examples (examples/seaography_example)	2m 36s
Examples (examples/tonic_example)	2m 29s
Compile PostgreSQL (tokio, native-tls)	3m 9s
Compile PostgreSQL (tokio, rustls)	3m 19s
Compile MySQL (actix, native-tls)	3m 1s
Compile MySQL (actix, rustls)	3m 14s
Compile SQLite (async-std, native-tls)	3m 3s
CLI	0s
Compile SQLite (async-std, rustls)	3m 10s
Issues Matrix	0s
Issues	0s
Postgres (14.4, tokio, native-tls)	7m 17s
MariaDB (10.6, actix, native-tls)	2m 16s
MySQL (8, actix, native-tls)	3m 35s
MySQL (5.7, actix, native-tls)	4m 11s
SQLite (async-std, native-tls)	2m 45s
SQLite (async-std, rustls)	3m 3s
	1h 16m 27s

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