Enabling comprehensive schema evolution in delta streamer code

[lokesh-lingarajan-0310]

Change Logs

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Impact

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Documentation Update

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• The config description must be updated if new configs are added or the default value of the configs are changed
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• Read through contributor's guide
• Change Logs and Impact were stated clearly
• Adequate tests were added if applicable
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[pratyakshsharma]

Thank you for your contribution @lokesh-lingarajan-0310

Can you please update the description of this PR?

[hudi-bot]

CI report:

• 4cb5672 Azure: FAILURE

Bot commands

@hudi-bot supports the following commands:

• @hudi-bot run azure re-run the last Azure build

[yihua]

Closing this for now as we have fixed the schema reconciliation. cc @jonvex