grafana-alloy: init at 1.1.1

[vunso]

Description of changes

Adding (grafana-)alloy, a rewrite of grafana-agent.

https://github.com/grafana/alloy
https://grafana.com/oss/alloy
Closes #303418

@flokli @emilylange I added you as maintainers as you already maintain grafana-agent and signaled interest in maintaining alloy as well. I hope that's ok!

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[flokli]

I updated this PR, fixed the darwin build by setting proxyVendor = true. Also noticed 1.1.1 is out since last week, so I updated it to that too and pushed to this PR.

I ran some smoketests locally, the web interface comes up and it accepts my old river config (from grafana-agent times), so things are looking fine.

I'd be fine to merging this in, but let's give @emilylange some time to also review this.

I was planning to continue with a NixOS module in a followup PR, either tomorrow or on the weekend, but no promises ;-)

[emilylange]

Also, @flokli, your grafana-agent: set mainProgram commit reads grafana-agent, not grafana-alloy.
You mixed that up.

We should probably just squash all of this into a single commit called
grafana-alloy: init at 1.1.1

[emilylange]

And we could format this with /new package/ with nixfmt-rfc-style.

[flokli]

Also, @flokli, your grafana-agent: set mainProgram commit reads grafana-agent, not grafana-alloy.
You mixed that up.

FIxed.

We should probably just squash all of this into a single commit called grafana-alloy: init at 1.1.1

I wanna maintain the original authorship, this already had quite some people touching it.

And we could format this with /new package/ with nixfmt-rfc-style.

I personally don't think the new formatter is an improvement, and have nixpkgs-fmt as my autoformatter configured in the editor - so doing it would get in my way. I'd like to keep it like this until it becomes nixpkgs-wide policy.