Warn when creating pipeline without specifying options

[yyy1000]

Fix #issue18699. Now the LOG will warn when creating pipeline without specifying options.

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[Abacn]

Thanks for the interests. However, the create() method without argument will take command line arguments as pipeline options. #18699 is talking about when there is no option found, either after command line is parsed or use create(PipelineOption) with an empty PipelineOption.

[yyy1000]

Got it!
I will continue to inspect it carefully.
BTW, could you please help me to review these issues and PR?
I submitted them some days ago but no one reply.
Thanks!
#issue24785 and the PR [#24773 ]

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Reminder, please take a look at this pr: @apilloud