fix: product connection resolution refactored to better work with the ProductQuery class

[kidunot89]

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What does this implement/fix? Explain your changes.

Fixes several issues with filter and sorting the product connections. This includes but is not limited to:

• minPrice: Fixed and working as expected.
• maxPrice: Fixed and working as expected.
• orderby: Fixed, however some potential breaking changes have occurred. Continue below

A few values for the ProductsOrderbyEnum have been deprecated or removed.

• SALE_PRICE: "Use PRICE instead. Previous functionality powering this value is no longer accessible"
• REGULAR_PRICE: "Use PRICE instead. Previous functionality powering this value is no longer accessible"
• ON_SALE_FROM: "No substitute available at the time or writing. Previous functionality powering this value is no longer accessible."
• ON_SALE_TO: "No substitute available at the time or writing. Previous functionality powering this value is no longer accessible."
• TOTAL_SALES: "Use "POPULARITY" instead, it's powered by the same functionality under-the-hood."
• RELEVANCE: "Removed completely, as the only usage I can find for it is in combination with search, and currently serve as the default sort type when the search param is used.

Does this close any currently open issues?

FIxes #877
Resolves #845

Any relevant logs, error output, GraphiQL screenshots, etc?

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Any other comments?

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Where has this been tested?

• WooGraphQL Version: …
• WPGraphQL Version: …
• WordPress Version:
• WooCommerce Version: