[RUST] Update Cargo crate authors

[nhynes]

This PR updates the Cargo.toml authors in preparation for #2292 and #2466. This, and the rest of the field, will be visible on crates.io).

[ehsanmok]

@nhynes I don't know if it's customary in apache projects but may I propose the initiator be added along with TVM contributors in author name and apache email for email part?

[nhynes]

propose the initiator be added along with TVM contributors

I'm in favor of following the existing convention in the rest of the TVM repo, which is to just say Contributors. The only reasons to add initiator are code ownership and recognition of contribution. Git automatically tracks both and the project already has a protocol for codeowners. Also, just having "Contributors" keeps things simple and solves the problem of making sure that all parties--author, reviewers, and design shepherds--are credited equally.

[ehsanmok]

@nhynes thanks for the explanations! I'm in favor of that too 👍 (however I meant more of possible accountability issue later on which is actually hard to enforce in OSS projects).

What about email? (cc @tqchen)

[tqchen]

Adding list of personal emails and accounts to the list creates a question of maintaining it, and one main question we need to ask is would it create barriers for new contributors?
I think a better way might be just following the Apache way of recognizing contributions, e.g. merit-based, reviewer list and committer-ships.

The PMC is actively working hard to make sure the community guideline is enforced :)

[ehsanmok]

@tqchen sure, makes sense! so what email we should use in Cargo.toml? tvm@apache.org ?

[tqchen]

We are still in the process of incubator proposals, so we can use a temporary placeholder email of the current maintainer if necessary.