[skip ci] Skip fpm tests crashing lsan on GHA

> LeakSanitizer has encountered a fatal error.

This happens only on 8.2/8.3 for some reason. Don't merge for 8.4 for now, we
can do that later if it reoccurs.

Author: iluuu1994

sapi/fpm/tests/bug68591-conf-test-group.phpt

@@ -3,6 +3,7 @@ FPM: bug68591 - config test group existence
 --SKIPIF--
 <?php
 include "skipif.inc";
+if (getenv("SKIP_ASAN") && getenv("GITHUB_ACTIONS")) die("skip leak sanitizer crashes");
 ?>
 --FILE--
 <?php

sapi/fpm/tests/bug68591-conf-test-user.phpt

@@ -3,6 +3,7 @@ FPM: bug68591 - config test user existence
 --SKIPIF--
 <?php
 include "skipif.inc";
+if (getenv("SKIP_ASAN") && getenv("GITHUB_ACTIONS")) die("skip leak sanitizer crashes");
 ?>
 --FILE--
 <?php