Update to clap 4

[rylev]

On the heels of #2847, this updates to Clap 4 which gets rid of some duplicate dependencies in the dependency tree. I did some light testing, but I'm not sure the best way to verify that this is functionally equivalent to the previous version.

[itowlson]

A couple of things I noticed while testing:

• The spin --help commands are no longer sorted alphabetically. It would be good to restore the sorting.

• There are obvious formatting differences in help output, some of which are neutral but some of which make it harder to read. For example, here is a fragment of spin up --help with clap 3:

and with clap 4:

The way clap 4 leaves line wrapping to the terminal, especially combined with the removal of colour highlighting, seems like a step backward. I don't know if clap 4 provides us with any knobs to control this behaviour though.

• Okay this is super duper weird but when I do spin up --follow foo it now panics with "thread 'main' panicked at /home/ivan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/clap_builder-4.5.2/src/builder/debug_asserts.rs:143:13:
  Command http: Argument or group 'tls-key' specified in 'requires*' for 'tls_cert' does not exist". This doesn't happen with Spin canary. --disable-wasmtime-cache , --listen, and presumably other trigger options, have the same problem. Heaven knows if there are any other bear traps like this, I only found it by accident when testing "multiple occurrence" flags...!

[rylev]

@itowlson I've addressed your feedback. Unfortunately, I've run into the same issue found in this previous attempt: #1198. It seems clap 4 doesn't lazily evaluate args like clap 3 did, and once it discovers an arg that can only go into the trigger_args bucket of otherwise unknown args, it starts slurping up everything else and putting it into trigger_args.

This means the following used to work but no longer does:

spin up --some-arg-meant-for-the-trigger --env "foo=bar"

This does not work because as soon as --some-arg-meant-for-the-trigger is seen, everything gets lumped into trigger_args. If --env is put first, than things work as expected.