refactor(sqlite): Resolve duplicate test target warning for macros.rs

[iamjpotts]

Does your PR solve an issue?

Resolves this cargo warning:

warning: ./Cargo.toml: file `./tests/sqlite/macros.rs` found to be present in multiple build targets:
  * `integration-test` target `sqlite-macros`
  * `integration-test` target `sqlite-unbundled-macros`

Merges the two target definitions in Cargo.toml and moves the sqlite vs sqlite-unbundled feature check to the top of the macros.rs module.

Is this a breaking change?

No; only affects test target configuration.