[HUDI-7711] Fix MultiTableStreamer can deal with path of properties files

[hwani3142]

Change Logs

• fix copy logic on MultiTableStreamer
  • copy propsFilePath into child streamer (child can read explicit configFile)
  • copy MultiStreamer's config into child (child can also read passed settings)
• override trivial functions for HoodieMultiTableStreamer.Config
• add some test with test properties

Impact

HoodieMultiTableStreamer

Risk level (write none, low medium or high below)

low

Documentation Update

none

Contributor's checklist

• Read through contributor's guide
• Change Logs and Impact were stated clearly
• Adequate tests were added if applicable
• CI passed

[hudi-bot]

CI report:

• bb03750 Azure: SUCCESS

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