Order of additional_contracts argument impacts compilation

[HCastano]

If a contract is included in an E2E test using the additional_contract argument then
this argument needs to come before any other invocations of ink_e2e::test, even if the
additional contracts aren't used, otherwise compilation fails.

For example, the below example fails to compile with the following error:

❯ cargo +nightly test --manifest-path ./examples/flipper/Cargo.toml

error[E0433]: failed to resolve: use of undeclared crate or module `accumulator`
  --> lib.rs:77:31
   |
77 |             let constructor = accumulator::constructors::new(0);
   |                               ^^^^^^^^^^^ use of undeclared crate or module `accumulator`

For more information about this error, try `rustc --explain E0433`.
error: could not compile `flipper` due to previous error

We should be able to include tests in any order, and we should expect that only tests
which use additional contracts require this argument.

This can be reproduced with ink@7789caf, cargo-contract@3e24722, and
substrate-contracts-node@0.21.0 using the following tests with Flipper:

#[cfg(test)]
mod e2e_tests {
    type E2EResult<T> = std::result::Result<T, Box<dyn std::error::Error>>;

    #[ink_e2e::test]
    // N.B, We need to include this, even though the `accumulator` contract isn't used in
    // this test, otherwise compilation of `e2e_second_instantiation` fails.
    //
    // #[ink_e2e::test(additional_contracts = "../delegator/accumulator/Cargo.toml")]
    async fn e2e_first_instantiation(
        mut client: ink_e2e::Client<C, E>,
    ) -> E2EResult<()> {
        let constructor = flipper::constructors::default();
        client
            .instantiate(&mut ink_e2e::alice(), constructor, 0, None)
            .await
            .expect("Instantiate `flipper` failed");

        Ok(())
    }

    #[ink_e2e::test(additional_contracts = "../delegator/accumulator/Cargo.toml")]
    async fn e2e_second_instantiation(
        mut client: ink_e2e::Client<C, E>,
    ) -> E2EResult<()> {
        let constructor = accumulator::constructors::new(0);
        client
            .instantiate(&mut ink_e2e::bob(), constructor, 0, None)
            .await
            .expect("Instantiate `adder` failed");

        Ok(())
    }
}

[SkymanOne]

additional_contracts has been removed in #2098