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