vector: 0.7.1 -> 0.7.2

[ghost]

Motivation for this change

This PR updates Vector to version 0.7.2. It also enables the tests.

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.

[nlewo]

The test fails on ofborg (the build bot). Could you take a look?

[thoughtpolice]

Sorry for leaving this around -- yes, looks like a strange test failure. Maybe something to do with parallelism (complete speculation)? Either way, if we could get the tests enabled, that would be great!

[ghost]

@thoughtpolice It turns out that all tests failures are caused by the fact that checkPhase runs in an environment which doesn't have file /etc/resolve.conf (and it was present when the tests were running inside a Docker container with official NixOS image, which made the issue uncaught). This file path is hardcoded in rust-dns-resolver which Vector uses.

I wonder is there a way to have file /etc/resolv.conf in the test environment.

[ghost]

Superseded by #81040.