Make the "state" checkout field optional for BG and HU (#36701)

* Make state optional for BG and HU.

* Add changelog.

* PHPCS spacing fix

* Hide State field for Hungary.

* Unhide the State in Hungary.

Some extensions might still use it e.g. for shipping purposes.

* Merge branch 'trunk' into fix/hu-and-bg-state-optional

plugins/woocommerce/changelog/fix-hu-and-bg-state-optional

@@ -0,0 +1,4 @@
+Significance: minor
+Type: fix
+
+Make states optional for Hungary and Bulgaria.

plugins/woocommerce/includes/class-wc-countries.php

@@ -882,6 +882,11 @@ class WC_Countries {
 							'hidden'   => true,
 						),
 					),
+					'BG' => array(
+						'state' => array(
+							'required' => false,
+						),
+					),
 					'BH' => array(
 						'postcode' => array(
 							'required' => false,
@@ -1115,7 +1120,8 @@ class WC_Countries {
 							'priority' => 72,
 						),
 						'state'      => array(
-							'label' => __( 'County', 'woocommerce' ),
+							'label'    => __( 'County', 'woocommerce' ),
+							'required' => false,
 						),
 					),
 					'ID' => array(