fix(shopping/merchant/products): Changed repeated flag of an existing…

… field `gtin` in message `.google.shopping.merchant.products.v1beta.Attributes` (googleapis#11247)

fix(shopping/merchant/products): An existing field `gtin` is moved out of oneof in message `.google.shopping.merchant.products.v1beta.Attributes`
docs(shopping/merchant/products): A comment for message `ProductInput` is changed
docs(shopping/merchant/products): A comment for field `name` in message `.google.shopping.merchant.products.v1beta.ProductInput` is changed
docs(shopping/merchant/products): A comment for field `name` in message `.google.shopping.merchant.products.v1beta.DeleteProductInputRequest` is changed
docs(shopping/merchant/products): A comment for message `Product` is changed
docs(shopping/merchant/products): A comment for field `name` in message `.google.shopping.merchant.products.v1beta.Product` is changed
docs(shopping/merchant/products): A comment for field `name` in message `.google.shopping.merchant.products.v1beta.GetProductRequest` is changed
docs(shopping/merchant/products): A comment for field `page_size` in message `.google.shopping.merchant.products.v1beta.ListProductsRequest` is changed
docs(shopping/merchant/products): A comment for field `gtin` in message `.google.shopping.merchant.products.v1beta.Attributes` is changed
docs(shopping/merchant/products): A comment for field `tax_category` in message `.google.shopping.merchant.products.v1beta.Attributes` is changed
docs(shopping/merchant/products): A comment for field `min_handling_time` in message `.google.shopping.merchant.products.v1beta.Shipping` is changed
docs(shopping/merchant/products): A comment for field `max_handling_time` in message `.google.shopping.merchant.products.v1beta.Shipping` is changed
docs(shopping/merchant/products): A comment for field `min_transit_time` in message `.google.shopping.merchant.products.v1beta.Shipping` is changed
docs(shopping/merchant/products): A comment for field `max_transit_time` in message `.google.shopping.merchant.products.v1beta.Shipping` is changed
feat(shopping/merchant/products): A new field `member_price_effective_date` is added to message `.google.shopping.merchant.products.v1beta.LoyaltyProgram`
feat(shopping/merchant/products): A new field `shipping_label` is added to message `.google.shopping.merchant.products.v1beta.LoyaltyProgram`

PiperOrigin-RevId: 704281512

Source-Link: googleapis/googleapis@0f1beb9

Source-Link: https://github.com/googleapis/googleapis-gen/commit/5429d7d40b248ad0347e916defee17ba51164011
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiNTQyOWQ3ZDQwYjI0OGFkMDM0N2U5MTZkZWZlZTE3YmE1MTE2NDAxMSJ9