Remove unnecessary parentheses from `JdbcDecoder`, `JdbcEncoder` and `Setter` summoners

[guizmaii]

To pass CI, this PR needs:

• https://github.com/zio/zio-jdbc/pull/168

[adamgfraser]

@guizmaii Why is this dependent on those changes? They should be completely unrelated.

[guizmaii]

@adamgfraser As you probably figured out, it's a Scala 3.2 issue