Refine the physical plan serialization and deserialization

[yahoNanJing]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

After #4390, there're still parts which needs to follow up for the physical plan.

• Remove Ballista related things in the datafusion.proto
• Add missing fields for FileScanExecConf, like output_ordering and config_options. Otherwise, it will block some Ballista UT.
• Make the code well organized for serialization and deserialization like physical plan does

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