grafana: 8.1.6 -> 8.2.3, fix CVE-2021-41174
grafana: 8.1.6 -> 8.2.3, fix CVE-2021-41174

ChangeLogs:
* https://github.com/grafana/grafana/releases/tag/v8.1.7
* https://github.com/grafana/grafana/releases/tag/v8.2.0
* https://github.com/grafana/grafana/releases/tag/v8.2.1
* https://github.com/grafana/grafana/releases/tag/v8.2.2
* https://github.com/grafana/grafana/releases/tag/v8.2.3

Apart from a few new features, most notably is CVE-2021-41174[1]. Darwin
is temporarily marked as unsupported because Go 1.17 doesn't support the
Apple SDK versions used in `nixpkgs`.

[1] https://nvd.nist.gov/vuln/detail/CVE-2021-41174

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs