Update nodejs/pnpm build helpers

[jaudiger]

This PR is a prerequisite for #1884. Some Node.js based recipes embeds pre-built binaries depending on the target platform. On sometimes these binaries try to access to system librairies at runtime through the dynamic linker. When we install a binary with npmInstallGlobal() or pnpmInstallGlobal(), we wrap it with std.addRunnable since it requires to be run through node:

    return std.addRunnable(std.directory(), name, {
      command: "node",
      args: [{ relativePath: target }],
      dependencies: [nodejs],
    });

The idea is to set the LD_LIBRARY_PATH with std.addRunnable for helping the dynamic linker to find shared libraries at runtime for these pre-built binaries. I tested it locally, and it does resolve the issue for tailwindcss and github_copilot_cli on x86_64 architecture.

[jaudiger]

Also I took the opportunity to uniformise all the *npmInstallGlobal helpers to take a dependencies list. Before this PR, one helper were having the possibility to set this list, now all the helpers have the same capabilities.