[ENG-84] Test cases for product apis (#3231)

* fix:added update pydantic model and update validation

* added setup

* feat:added testcases for create product

* feat:added testcases for update products

* feat:added testcases for retrieve & lisitng products

* fix:updated the testcases

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Co-authored-by: Aakash Singh <mail@singhaakash.dev>
Co-authored-by: Prafful Sharma <115104695+praffq@users.noreply.github.com>

Author: 3 people