Add missing product option types

Sample products data was reworked with #solidusio/pull/5437.
After these changes, some products with variants remained without
option types, meaning that their variants remained not visible and
selectable on the FE, and in the admin it was not possible to add
new ones as the relevant button was hidden.

sample/db/samples/product_option_types.rb

@@ -5,12 +5,17 @@
 size = Spree::OptionType.find_by!(presentation: "Size")
 color = Spree::OptionType.find_by!(presentation: "Color")
 
-solidus_cap = Spree::Product.find_by!(name: "Solidus cap")
+products_with_variants = [
+  "Solidus cap",
+  "Solidus hoodie",
+  "Solidus t-shirt",
+  "Solidus mug set",
+  "Solidus tote",
+  "Solidus Water Bottle"
+]
 
-solidus_cap.option_types = [size, color]
-solidus_cap.save!
-
-solidus_hoodie = Spree::Product.find_by!(name: "Solidus hoodie")
-
-solidus_hoodie.option_types = [size, color]
-solidus_hoodie.save!
+products_with_variants.each do |name|
+  product = Spree::Product.find_by!(name: name)
+  product.option_types = [size, color]
+  product.save!
+end