Use JS I18n function in assets to avoid parsing error

[mkllnk]

What? Why?

Closes #6749

I checked all assets for the same pattern and they seem fine:

$ git ls-files -- app/assets/**.erb* | xargs git grep -w t -- 
app/assets/javascripts/admin/spree/base.js.erb:  // Trunkate text in page_title that didn't fit
app/assets/javascripts/admin/spree/orders/variant_autocomplete.js.erb:        alert(t("js.admin.orders.quantity_adjusted"));
app/assets/javascripts/admin/spree/orders/variant_autocomplete.js.erb:      alert(t("js.admin.orders.quantity_unchanged"));

What should we test?

Repeat the steps in #5989 (comment).

Release notes

Changelog Category: Technical changes

Use javascript translate function in all assets.

[andrewpbrett]

Looks good - nice catch, and good thinking to check elsewhere for the same pattern.

[filipefurtad0]

Hey @mkllnk ,

I think the previous PR addresses correctly the editing an order, but there are some issues still around the creation of an order.

With a stock limit of 5 items, for that product, with no inventory overrides we can observe the following, while

Editing an order - this is OK - the stock can only be increased till 10 👍

Creating an new order:

The selector does not set a limit. Also, after creating the line item it's possible to increase the stock till 6, which is incorrect.

Updating issue #6739 to include this last bit.

This last case is not introduced by this PR. This is ready to go.