feat: rework data node mode options and make the default archive

[wwestgarth]

closes #9562

I've removed the --archive and --lite options in favour of a single --mode=[archive|lite|standard]. Makes things a bit cleaner.

wwestgarth@wwestgarth-macbook ~/work/vega -  (9562-make-archival-default) $ vega datanode init --help
Usage:
  datanode [OPTIONS] init <ChainID> [options]

Generate the minimal configuration required for a vega data-node to start. The Chain ID is required.

Help Options:
  -h, --help                             Show this help message

[init command options]
          --home=                        Path to the custom home for vega
      -f, --force                        Erase exiting vega configuration at the specified path
          --mode=[archive|lite|standard] Set which mode to initialise the data node with, will affect retention policies (default: archive)