docker-slim: fix dynamically compiled docker-slim go binaries should be statically linked

[MartinLoeper]

Fix #371787

The dynamically linked executable slim-sensor fails to execute when it is copied and run by slim build. We are better off to statically link the go executable instead. The docker-slim maintainer confirmed they are also statically linking the binary when distributing it.

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/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 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.

---

@mbrgm @Br1ght0ne @marsam

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[MartinLoeper]

Before this PR:

file ./result/bin/slim-sensor
./result/bin/slim-sensor: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /nix/store/65h17wjrrlsj2rj540igylrx7fqcd6vq-glibc-2.40-36/lib/ld-linux-x86-64.so.2, stripped

After this PR:

file ./result/bin/slim-sensor
./result/bin/slim-sensor: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, stripped

The other binary which is named slim is not modified. It is also not copied into non-nix environments and thus must not be statically compiled.