fix: remove short command for --container

[mikn]

Cannot use the svcs image-name command currently as the short command for container conflicts with the global option --config. This removes the short command for container and fixes the issue.

The current error:

> molnctl svcs image-name molnettcom -q -u molnett.yaml

thread 'main' panicked at /home/mikn/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/clap_builder-4.5.37/src/builder/debug_asserts.rs:112:17:
Command image-name: Short option names must be unique for each argument, but '-c' is in use by both 'container' and 'config'
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace