Complete cargo check bin targets like build

[ian-h-chamberlain]

Description

Since check operates on basically the same things as build, it makes sense to complete binary targets the same way (i.e. tests, bins, examples)

Relates to #8429 — these completions already existed, just were being ignored for check.

Before

ianchamberlain@MacBook-Pro ~/D/D/fish-shell (fix/cargo-check-completions)> complete -C 'cargo check --bin '
benchmarks/
BSDmakefile
build.rs
build_tools/
Cargo.lock
Cargo.toml
CHANGELOG.rst
cmake/
CMakeLists.txt
CODE_OF_CONDUCT.md
CONTRIBUTING.rst
COPYING
debian/
docker/
Dockerfile
doc_internal/
doc_src/
etc/
fish.desktop
fish.pc.in
fish.png
fish.spec.in
GNUmakefile
osx/
po/
README.rst
share/
src/
target/
tests/

After:

ianchamberlain@MacBook-Pro ~/D/D/fish-shell (fix/cargo-check-completions)> complete -C 'cargo check --bin '
fish
fish_indent
fish_key_reader

TODOs:

• Changes to fish usage are reflected in user documentation/manpages.
• Tests have been added for regressions fixed
• User-visible changes noted in CHANGELOG.rst

Are any of these needed for such a small completion fix? Also, is this something that would make sense to backport to 3.7 or something (not sure what the release plan / versioning scheme is looking like at this point)?

[mqudsi]

Merged with thanks.

[zanchey]

No release note required, and can't see us doing another 3.7 at this stage - better to try and get 3.8 out.

[mqudsi]

@zanchey sorry, I keep forgetting to label these when I go through them quickly.