netdata: Enable cloud support using ACLK-NG

[leotaku]

Motivation for this change

This PR enables Netdata cloud support using ACLK-NG if not on MacOS/Darwin for the Netdata package. This PR is based on #123707, which contains only the update of Netdata to version 1.31.0.

Would close #91549

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[r-rmcgibbo]

Result of nixpkgs-review pr 123709 at 717a372c run on x86_64-linux 1

2 packages built successfully:

• netdata
• tests.trivial

2 suggestions:

• warning: maintainers-missing

  Package does not have a maintainer. Consider adding yourself?

  Near pkgs/tools/system/netdata/default.nix:90:5:

     |
  90 |     maintainers = [ ];
     |     ^
  

• warning: unused-argument

  Unused argument: fetchpatch.
  Near pkgs/tools/system/netdata/default.nix:11:3:

     |
  11 | , fetchpatch
     |   ^
  

---

Result of nixpkgs-review pr 123709 at ae0c269 run on aarch64-linux 1

1 package built successfully:

• netdata

[leotaku]

I have just learned that ACLK-NG, the mechanism we would like to use to enable cloud support is currently broken on MacOS/Darwin (See netdata/netdata#10842). I will edit this PR to conditionally disable the agent-cloud link if we are on Darwin.

[K900]

Anything blocking this? I've been running it locally for a bit and it seems to work well.

[RaghavSood]

Result of nixpkgs-review pr 123709 run on x86_64-linux 1

1 package built:

• netdata

[wmertens]

I'd like to see this backported to 21.05