[nix] Migrate linter installation to nix

[maru-ava]

Why this should be merged

Migrate linter installation to nix to reduce installation time and ensure consistency between CI and local usage.

If seeing VCS errors when running lint.sh under a nix shell on macos, the following commands should fix it:

sudo xcode-select --reset
sudo xcode-select --switch /Library/Developer/CommandLineTools

Reference: NixOS/nixpkgs#355486 (comment)

How this works

• adds a package for golangci-lint that downloads release binaries
• uses nixos packages for shellcheck and actionlint

How this was tested

CI

Need to be documented in RELEASES.md?

N/A

TODO

• Merge [nix] Add package for official golang binaries #3824

[JuanLeon2]

@StephenButtolph are you ok with this?
Secondarily: why does this require Stephen? Because it changes a github action?

[StephenButtolph]

are you ok with this?

Yes.

why does this require Stephen? Because it changes a github action?

Unless otherwise specified, I am the only person that default as an owner of a file. The change in the go.mod marks me as a required reviewer

[maru-ava]

This PR is maybe not the best path forward, I did some work in hypersdk to ensure consistent installation of golang binaries that is probably preferable to having to package golang modules with nix:

ava-labs/hypersdk#2030