Upgrade sqlx to v0.7

[nyurik]

This is mostly a noop, just updating to the new way of storing cached queries and a few other changes per https://github.com/launchbadge/sqlx/blob/main/CHANGELOG.md#070---2023-06-30

Note that this uses some of the code from #729 (thanks @upsicleclown !)

A minor unrelated change - a reformat of martin/release.toml

[birkskyum]

I see a change between actix - tokio wrt the sqlx - are they interchangeable for us?

[nyurik]

@birkskyum yes, actix uses tokio internally anyway. Also, see this sqlx changelog comment:

The runtime-actix-* features have been deleted. They were previously changed to be aliases of their runtime-tokio-* counterparts for backwards compatibility reasons, but their continued existence is misleading as SQLx has no special knowledge of Actix anymore.
To fix, simply replace the runtime-actix-* feature with its runtime-tokio-* equivalent.