Teach .pkg, .msi, .exe installers about RLS

[brson]

RLS can be installed via rustup, but not the other methods yet. We really can't claim RLS is released without.

I'm putting this on the 1.19 milestone because I don't see it being fixed in 1.18 at this point.

cc @nrc

[brson]

Help would be appreciated for any of the three packaging solutions. RLS should be a non-default component.

The code responsible for packaging starts in in src/bootstrap/dist.rs

[efyang]

So if I'm looking at this right the main files that would need to be changed are src/bootstrap/dist.rs and the manifests in src/etc/installer/. Could I try taking up this issue?

[o01eg]

Can it be related to gentoo/gentoo-rust#255 ?

[efyang]

Would it make more sense to have the analysis module be a child "feature" of the RLS or just entirely bundled with the RLS? @brson

[nagisa]

Why not just ship two installers?

EDIT: oh, I see it is non-default component already. Shrugs.

[brson]

Thanks so much for tackling all three of them @efyang!

Sadly we're going to need to revert temporarily per #42357 until we make some more decisions about how we want to message rls stability. RLS is not going to happen for 1.19.