Ensure all relevant metaboxes on Product Admin are reflected in TEv2

[JustinSainton]

Currently, we provide a lot of functionality in the product view that is unavailable in TEv2. We need to conditionally remove these, or provide this functionality.

[JustinSainton]

Outline of functionality currently available on the product admin screen that is not available in TEv2:

• Pricing Metabox
  • Donations
  • Currencies
  • Quantity-Based Discounts
• Product Delivery Metabox
  • External Links
• Product Details Metabox
  • Image Gallery
  • Short Description
  • Personalization (Image Uploads or Personalized Message)
  • Metadata (proposing we nix this entirely)

[JustinSainton]

External Links sorted out via #2206