Fix #7371

 'catalog_rule_price' is added to products only before load of the Magento\ConfigurableProduct\Model\ResourceModel\Product\Type\Configurable\Product\Collection and it is used only for detecting the minimal price here - Magento\Catalog\Pricing\Price\BasePrice. Due to it the price has never converted to the site currency.

Author: rossluk

app/code/Magento/CatalogRule/Pricing/Price/CatalogRulePrice.php

@@ -99,9 +99,9 @@ public function getValue()
                         $this->product->getId()
                     );
                 $this->value = $this->value ? floatval($this->value) : false;
-                if ($this->value) {
-                    $this->value = $this->priceCurrency->convertAndRound($this->value);
-                }
+            }
+            if ($this->value) {
+                $this->value = $this->priceCurrency->convertAndRound($this->value);
             }
         }