run-tests.php: Adding support for sections EXPECT_EXTERNAL, EXPECTF_EXTERNAL and EXPECTREGEX_EXTERNAL. (Issue 55736)
Merge branch 'issue-55736' of https://github.com/tistre/php-src

implements FR #55736

* 'issue-55736' of https://github.com/tistre/php-src:
  run-tests.php: Adding support for sections EXPECT_EXTERNAL, EXPECTF_EXTERNAL and EXPECTREGEX_EXTERNAL. (Issue 55736)