Update GH Actions

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cachix/install-nix-action	action	major	v27 -> v30
ubuntu	github-runner	major	22.04 -> 24.04

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Release Notes

cachix/install-nix-action (cachix/install-nix-action)

v30

Compare Source

• Nix: 2.24.7 -> 2.24.9, fixing GHSA-6fjr-mq49-mm2c

v29

Compare Source

Bumps Nix to 2.24.7

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[straight-shoota]

LLVM CI fails on the ubuntu24.04 image due to being unable to locate package libtinfo5.

[HertzDevil]

libtinfo5 was originally needed for the LLVM 16.0.0 binaries, and is unnecessary for 16.0.3, but it appears all the LLVM 18 packages also have this problem; in short, anything built on ubuntu-18.04 will break now. Newer builds link against libtinfo6 which should be pre-installed on the CI runner images. This is an optional dependency that is supposedly only needed for LLDB's TUI support.

We should probably go with #14573. We can't really switch to the official Apt repository for Ubuntu 24.04 unless we drop LLVM 16 and below.

[straight-shoota]

I suppose we could also stay on ubuntu-22.04 for LLVM <= 16 and upgrade to 24.04 for newer versions. That would be a very quick fix to move forward with the latest machine image where currently possible.