Change Sales Price of all variant based on adding or remove any Values on Attributes and Variants page on Product Template

[aashutosh1710]

module: product_variant_sale_price
version: 18.0

Steps to reproduce

• Create one Product which having 4 or 5 Variant.
• Change the Sales Price on the each Variants as per module functionality.
• Now add or remove any Values on Attributes and Variants page on Product Template.

Current behavior

• Override the Sales Price of all variant which we set variant specific and set same Sales Price on all the Variants.
• Change Sales Price of all variant based on adding or remove any Values on Attributes and Variants page on Product Template.

Expected behavior

• Custom set Sales Price did not requires to be override when adding or remove any Values on Attributes and Variants page on Product Template.

Example

• Create one Product with Name as "Test Product 1", Sales Price as 33 $ and having Attributes and Variants as Color : Red, Green and Size : M, XL.
  So 4 variants are created each with 33$ as Sales Price
• Change Sales Price of Variant RED, M to 44$, RED, XL to 55$, Green, M to 66$, Green, XL to 77$.
  So now each variant has a Different Sales Price as per this module functionality.
• Go to Product Template > Attributes and Variants page > Adding New variant Color : Blue or same way Remove any variant like Color : Red and save it.
• Go to all Product Variants related to "Test Product 1",
  Notice that all custom set price like Green, M to 66$, Green, XL to 77$ override with common price same as 33 $ of Product Template.