main: Reorder subcommand functions
main: Reorder subcommand functions

Order subcommands' helper functions by alphabetical order.

BUG=none
TEST=cargo build

Change-Id: Ida9bc28a02ccceef764c7eae49b74a572be57cf3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3070722
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Commit-Queue: Keiichi Watanabe <815e4e8f7c92a23424d7c3f51ead622bcedbc720@chromium.org>
Reviewed-by: Chirantan Ekbote <35787c0e27de5c48735e07f8324823b765e8bcbc@chromium.org>

google/crosvm,google/crosvm,google/crosvm,google/crosvm