[12.x] Add missing @throws annotations to Database Connection class (#57452)

- Add @throws RuntimeException to escape() method
- Add @throws RuntimeException to escapeBinary() method

These methods throw RuntimeException when the PDO connection is not available but were missing proper @throws annotations in their docblocks.

Author: sumaiazaman

src/Illuminate/Database/Connection.php

@@ -1101,6 +1101,8 @@ public function raw($value)
      * @param  string|float|int|bool|null  $value
      * @param  bool  $binary
      * @return string
+     *
+     * @throws \RuntimeException
      */
     public function escape($value, $binary = false)
     {
@@ -1154,6 +1156,8 @@ protected function escapeBool($value)
      *
      * @param  string  $value
      * @return string
+     *
+     * @throws \RuntimeException
      */
     protected function escapeBinary($value)
     {