If you're using Shopify's Google Analytics setup like nearly every store, the best way to do this is, is in the analysis stage using a GA filter. Go to the behavior section, then filter pages that contain "/product_1".
If you're more advanced, you could perhaps create a regex filter rule that groups this data into a single page type.
I haven't done this myself, but if you wanted to, you should be able to do with Filters. Create a filter that extracts the /products/product-name part of a URL and removes /collections/collections-name when a URL contains /products/product-name. Use regex. Make sure you create a new View to not butcher your primary All Web Site Data view.