[Feature][Seatunnel-core-flink/spark] format usage help message

[legendtkl]

Purpose of this pull request

related issue: #1787

With this PR, we can get a better output of usage help message

Before

./start-seatunnel-flink.sh -h
Usage: start-seatunnel-flink.sh [options] Options: -t, --check check config Default: false start-seatunnel-flink.sh start-seatunnel-spark.sh start-seatunnel-sql.sh -c, --config Config file -h, --help Show the usage message -r, --run-mode job run mode, run or run-application Default: RUN Possible Values: [RUN, APPLICATION_RUN] -i, --variable variable substitution, such as -i city=beijing, or -i date=20190318 Default: []

After

Usage: start-seatunnel-sql.sh [options]
  Options:
    -t, --check    check config (default: false)
  * -c, --config   Config file
    -h, --help     Show the usage message
    -r, --run-mode job run mode, run or run-application (default: RUN) 
                   (values: [RUN, APPLICATION_RUN])
    -i, --variable variable substitution, such as -i city=beijing, or -i 
                   date=20190318 (default: [])

Check list

• Code changed are covered with tests, or it does not need tests for reason:
• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/incubator-seatunnel/tree/dev/docs

[legendtkl]

Hi, @ruanwenjun , would you help review this tiny PR when you're available?

Thanks,
Kelu.

[ruanwenjun]

@legendtkl Which system are you using, Windows?

[legendtkl]

macOS Monterey @ruanwenjun

[ruanwenjun]

macOS Monterey @ruanwenjun

It looks well on my laptop(macOS x86).

[legendtkl]

it's wired... This is my case.

[ruanwenjun]

@legendtkl Sorry, you are right, I didn't update my code.

[ruanwenjun]

LGTM