Respect the country tax label setting on the product page

[boo-code]

Questions	Answers
Description?	The product page prints "No tax" whenever taxes are disabled without consulting the country's "Display tax label" setting, which the very next branch of the same template already honours. $configuration.display_taxes_label is $this->context->country->display_tax_label (FrontController::getDisplayTaxesLabel()), so a merchant who turns that checkbox off still gets a tax statement on every product page. Both branches are now gated on the setting.
Type?	bug fix
BC breaks?	no
Deprecations?	no
Fixed ticket?	Fixes PrestaShop/PrestaShop#21484
Sponsor company
How to test?	Set a country's "Display tax label" to No (International > Locations > Countries), then disable taxes (International > Taxes > Enable taxes: No) and open a product page. Before: "No tax" is displayed. After: nothing is displayed. With the label set to Yes the behaviour is unchanged in both tax states.

Before

{if !$configuration.taxes_enabled}
  {l s='No tax' d='Shop.Theme.Catalog'}
{elseif $configuration.display_taxes_label}
  {$product.labels.tax_long}
{/if}

After

{if $configuration.display_taxes_label}
  {if $configuration.taxes_enabled}
    {$product.labels.tax_long}
  {else}
    {l s='No tax' d='Shop.Theme.Catalog'}
  {/if}
{/if}

Why this shape

PrestaShop/PrestaShop#25882 fixed the same defect for the cart summary and the
order confirmation table by gating on display_taxes_label together with taxes_enabled, and was merged
in October 2021. The product page was not part of it, which is why the issue is still open with this exact
template quoted in the thread. Using the same gate keeps the three places consistent rather than inventing
a rule for this one.

Scope

Only the product page template changes. The cart summary and the order confirmation table already respect
the setting since PrestaShop/PrestaShop#25882, and so does DeliveryOptionsFinder.

Companion to the same change in hummingbird: the two themes carry the same template and the same defect.