Auto-publishing fails because of the `toolchain` crate

[lnicola]

I don't see anything wrong, but...

[pksunkara]

Hmm... I don't have any idea what's happening here. I guess that this proc-marco-test should not be excluded from workspace members, if it depends on a workspace member.

[Veykril]

Why is it even considered for auto-publishing? It should not be published given its set publish = false.

[Veykril]

Anyway, that crate can probably be included again (and just the imp crate excluded as before). Can't recall why I changed that.

[pksunkara]

It's not considered for auto publish but is considered for cargo update command which errors out because toolchain has been renamed to ra_ap_toolchain but proc-macro-test hasn't been updated because it is not a workspace member