Add smoke test for proxies

[Rustin170506]

close #2739

• Add smoke test for proxies
• Gen the new workflows

[kinnison]

Why not running these ?

[Rustin170506]

Because they have other dependencies and there are related issues that have not been resolved. So we can skip it for now.
cc: #2838 and rust-lang/rust#61282

[rbtcollins]

I'm quite curious why this smoke test is a bash script, only running in CI, and not a rust integration test running in our test suite.

I can see the value in something that explicitly inspects the expected set of proxies, makes sure they can all be invoked, and are all correct hardlinks to each other. I don't think we have that today.

But I see lots of technical debt in this particular testing approach and am not a fan.

[Rustin170506]

I can see the value in something that explicitly inspects the expected set of proxies, makes sure they can all be invoked, and are all correct hardlinks to each other. I don't think we have that today.

@rbtcollins Sounds good, can you provide some guidance? I'm trying to invoke the bin out of mock and it looks like it goes into recursion and then fails.

 let path = &config.cargodir.join(&format!("bin/{}{}", tool, EXE_SUFFIX));
 expect_component_executable(config, path.to_str().unwrap());

out.stderr (1 lines):
    error: the 'rustdoc' binary, normally provided by the 'rustc' component, is not applicable to the 'stable-x86_64-apple-darwin' toolchain