ci(rust-analyzer): move actions to ubuntu-22

[marcoieni]

ubuntu-20 will be removed in April. See announcement here.

How can we test this before merging?
Also, this change will make rust-analyzer incompatible with ubuntu 20 and other old distros, right?

[rustbot]

r? @Mark-Simulacrum

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[marcoieni]

Wait..I found this file is duplicated in https://github.com/rust-lang/rust-analyzer/blob/master/.github/workflows/release.yaml

Maybe I should edit that one?

I'm confused. Why isn't src/tools/rust-analyzer a submodule?

[marcoieni]

anyway, I'll close this

[jieyouxu]

@marcoieni r-a and miri uses josh, and uses josh to manage josh-mediated subtree syncs (not submodule) IIRC. Note that they're also not purely git subtrees.

Other tools like rustfmt and cargo and custom cg like cg_gcc or cg_clif still use git submodules, IIRC.

e.g. see discussions.