In the --help output, the "Global Flags" and "Commands" output order should be consistent

**Version** ``` Fastly CLI version v13.3.0 (0719b16c) Built with go version go1.24.11 darwin/arm64 (2026-02-13) Viceroy version: viceroy 0.16.1 ``` **What happened** For `fastly service --help`, I see the output in this order: 1. "Global Flags" (top) 2. "Commands" (bottom) Then from `fastly compute publish --help`, I see 1. "Optional Flags" (top) 2. "Global Flags" (bottom) Ideally, we'd have consistent ordering across the entire CLI.