AnyEncode is being removed but not mentioned in CHANGELOG

[billy1624]

Bug Description

I guess it's not intended to remove the capability to encode "common" values of all database drivers.

We have this AnyEncode trait in v0.6.x

https://docs.rs/sqlx/0.6.3/sqlx/trait.Encode.html#impl-Encode%3C'q,+Any%3E-for-Option%3CT%3E

However, it has been removed since v0.7.x in this PR, https://github.com/launchbadge/sqlx/pull/2039/files#diff-171f0c0ada41fb71384e917f3b78cb779c3a55e6fad6e7ac183511538c2d8840

Minimal Reproduction

Before upgrading to SQLx v0.7.x, https://github.com/SeaQL/sea-query/actions/runs/5437420800/jobs/9887963394#step:4:383

After upgrading to SQLx v0.7.x, https://github.com/SeaQL/sea-query/actions/runs/5484436965/jobs/9991980807?pr=652#step:4:395, CI of PR SeaQL/sea-query#652

Info

• SQLx version: v0.7.0
• SQLx features enabled: postgres,sqlite,any,mysql,chrono
• Database server and version: MySQL, Postgres, SQLite, Any
• Operating system: Ubuntu 22.04 LTS
• rustc --version: 1.70.0 (90c541806 2023-05-31)

[abonander]

The AnyEncode trait is no longer needed as the relationship was inverted: for a database to support conversion to the Any driver, it must support all the types that the Any driver does.

Thus, Encode<Any> should be sufficient now.

[billy1624]

Hey @abonander, thanks for the attention! As far as I know we cannot encode types like NaiveDate, NaiveDateTime, etc, on Any driver.

error[E0277]: the trait bound `NaiveDate: Encode<'_, sqlx::Any>` is not satisfied
  --> src/sqlx_any.rs:54:30
   |
54 |                     args.add(d.map(|d| *d));
   |                          --- ^^^^^^^^^^^^^ the trait `Encode<'_, sqlx::Any>` is not implemented for `NaiveDate`
   |                          |
   |                          required by a bound introduced by this call
   |
   = help: the following other types implement trait `Encode<'q, DB>`:
             <NaiveDate as Encode<'_, MySql>>
             <NaiveDate as Encode<'_, Postgres>>
             <NaiveDate as Encode<'_, Sqlite>>
   = note: required for `Option<NaiveDate>` to implement `Encode<'_, sqlx::Any>`
note: required by a bound in `sqlx::Arguments::add`
  --> /Users/billy/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sqlx-core-0.7.0/src/arguments.rs:19:24
   |
19 |         T: 'q + Send + Encode<'q, Self::Database> + Type<Self::Database>;
   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `Arguments::add`