Let Rust analyzer show the `Run Test | Debug` buttons for each test case

[t-moe]

This is related to rust-lang/rust-analyzer#17011 and can probably be fixed by emitting #[::core::prelude::v1::test] from my macros.

tokio test does this as well: https://github.com/tokio-rs/tokio/blob/a1acfd8c20475e8a878b012ac4aa90b361f004ae/tokio-macros/src/entry.rs#L365 )

Lets just hope that #[::core::prelude::v1::test] stays a no-op, when harness=false for that particular test.

[t-moe]

Simply emitting #[::core::prelude::v1::test] before the test function does not seem to work.
Instead it looks like you have to manually convert the function into a token stream
https://github.com/tokio-rs/tokio/blob/master/tokio-macros/src/entry.rs#L589

couldnt get this to work in 30min. Not sure if needed. keeping this issue open until I get more user feedback