git-ignore datafusion/proto/src/generated/datafusion.rs

[crepererum]

Which issue does this PR close?

-

Rationale for this change

I was close to accidentally adding this file to my PRs so many times by now, let's just git-ignore it.

What changes are included in this PR?

New git-ignore rule.

Are these changes tested?

-

Are there any user-facing changes?

-

[tustvold]

This is intentionally checked in https://github.com/apache/arrow-datafusion/blob/master/datafusion/proto/proto/datafusion.proto as part of the story around not needing users to have protoc installed? It is gross, but see #3950 for more context

If you're seeing a diff this would imply something is off with the version pins somewhere?

[crepererum]

I'm not talking about the proto file but the generated .rs file. The latter one is NOT checked in at the moment (although I can change this PR to do so).

[tustvold]

Oh... I'm curious what is generating that, is it some artifact from before #3950 perhaps? I can't seem to generate such a file locally...

[jackwener]

I also meet this😂

[crepererum]

I cannot reproduce this on current master anymore. Maybe it's a left-over.