fix: formatters CLI flags help message

[ccoVeille]

The flags were the ones of the linters commands.

The help text was displaying the linters help text.
And the completions was allowing to use --disable, --fast-only, --enable-only, and others that
are not supported by the formatters commands.

Before

$ golangci-lint formatters --help
List current formatters configuration

Usage:
  golangci-lint formatters [flags]

Flags:
  -c, --config PATH           Read config from file path PATH
      --no-config             Don't read config file
      --default string        Default set of linters to enable (default "standard")
  -D, --disable strings       Disable specific linter
  -E, --enable strings        Enable specific linter
      --enable-only strings   Override linters configuration section to only run the specific linter(s)
      --fast-only             Filter enabled linters to run only fast linters
      --json                  Display as JSON

Global Flags:
      --color string   Use color when printing; can be 'always', 'auto', or 'never' (default "auto")
  -h, --help           Help for a command
  -v, --verbose        Verbose output

After

$ golangci-lint formatters --help
List current formatters configuration

Usage:
  golangci-lint formatters [flags]

Flags:
  -c, --config PATH      Read config from file path PATH
      --no-config        Don't read config file
  -E, --enable strings   Enable specific formatter
      --json             Display as JSON

Global Flags:
      --color string   Use color when printing; can be 'always', 'auto', or 'never' (default "auto")
  -h, --help           Help for a command
  -v, --verbose        Verbose output

[CLAassistant]

All committers have signed the CLA.

[ccoVeille]

The only thing I doubt now I'm reading again the --help message

golangci-lint formatters --help
List current formatters configuration

Usage:
  golangci-lint formatters [flags]

Flags:
  -c, --config PATH      Read config from file path PATH
      --no-config        Don't read config file
  -E, --enable strings   Enable specific formatter
      --json             Display as JSON

Global Flags:
      --color string   Use color when printing; can be 'always', 'auto', or 'never' (default "auto")
  -h, --help           Help for a command
  -v, --verbose        Verbose output

Is there really a --enable flag with golangci-lint formatters

[ldez]

yes

[ldez]

LGTM