Handle timestamp_ntz in delta conversion target

[vinishjail97]

Important Read

• Please ensure the GitHub issue is mentioned at the beginning of the PR

What is the purpose of the pull request

Handle timestamp_ntz in delta target, this needs to be done in a better way by finding this function in delta codebase.
https://docs.delta.io/2.0.0/versioning.html
When creating a table, Delta Lake chooses the minimum required protocol version based on table characteristics such as the schema or table properties

Brief change log

(for example:)

• • Handle timestamp_ntz in delta target*

Verify this pull request

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This pull request is a trivial rework / code cleanup without any test coverage.

(or)

This pull request is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

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• Added integration tests for end-to-end.
• Added TestConversionController to verify the change.
• Manually verified the change by running a job locally.

[vinishjail97]

Handle this gracefully by calling the function which upgrades version in delta codebase, this was the pending comment from the previous PR that wasn't addressed.

#428