Order rust lints before clippy lints to allow ignoring unknown lints (#4030)

When updating the Rust toolchain in a quickly moving repository, it can
be difficult to atomically fix all the lints and update the toolchain in
a single commit. It can be helpful to:

* land a patch that adds the flags `-Aunknown_lints
-Aclippy::useless_borrows_in_formatting`. Rust needs them in that order,
otherwise it will error out.
* land the toolchain update.
* clean up the remaining lint failures.

Unfortunately before this patch rules_rust would emit the clippy lints
first, then the rustc lints, so we couldn't use this pattern. This patch
reverses the order and fixes this issue.

Co-authored-by: Daniel Wagner-Hall <dawagner@gmail.com>