Add Available Begin on , Available Until date to the product (OCC-408)

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Is your feature request related to a problem? Please describe

Add Available Begin on , Available Until date to the product, even dates array

Describe the solution you'd like

For Add Available Begin on , Available Until date to the product , add two DateFields

Describe alternatives you've considered

For dates Array, next step, Calendar

Jira issue

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By ContentPart

[infofromca]

For simplicity, Add public DateTimeField StartTimeUtc { get; set; } = new(); to ProductPart