Return error when invalid currentPage is provided

[pmclain]

Description (*)

Adds input validation for the minimum currentPage value

Fixed Issues (if relevant)

1. currentPage: 0, currentPage: 1 and currentPage: -1 produces the same output for products query when filtering is used #727

Manual testing scenarios (*)

{
  products (
    filter: {
      sku: {
        like:"simple%"
      }
    }
    pageSize: 4
    currentPage: 0
  ) {
    items {
      sku
    }
  }
}

Queries with a current page value < 1 should return error:
currentPage value must be greater than 0.

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

[magento-engcom-team]

Hi @lenaorobei, thank you for the review.
ENGCOM-5218 has been created to process this Pull Request

[magento-engcom-team]

Hi @lenaorobei, thank you for the review.
ENGCOM-5218 has been created to process this Pull Request

[ghost]

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