Networks and Sites: Replace "N/A" with "Not applicable" in `choose_primary_blog()`

This changeset replaces "N/A" with "Not applicable" in the `choose_primary_blog()` function. It also makes the text string translatable.

Props kowsar89, SergeyBiryukov, audrasjb, mukesh27.
Fixes #57040.

Built from https://develop.svn.wordpress.org/trunk@54832


git-svn-id: http://core.svn.wordpress.org/trunk@54384 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/ms.php

@@ -783,7 +783,7 @@ function choose_primary_blog() {
 				update_user_meta( get_current_user_id(), 'primary_blog', $blog->userblog_id );
 			}
 		} else {
-			echo 'N/A';
+			_e( 'Not available' );
 		}
 		?>
 		</td>

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-54831';
+$wp_version = '6.2-alpha-54832';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.