phone_number warninglist contains invalid regex, and causes slowdowns when enabled

[UFOSmuggler]

This regex based warninglist contains the regex global g modifier/flag to match all occurrences, which causes preg_match in the warninglist model to fail since preg_match stops after the first occurrence so does not support g:

2025-05-20 04:25:38 Warning: Warning (2): preg_match() [<a href='http://php.net/function.preg-match'>function.preg-match</a>]: Unknown modifier 'g' in [/var/www/MISP/app/Model/Warninglist.php, line 738]
Trace:
ErrorHandler::handleError() - APP/Lib/cakephp/lib/Cake/Error/ErrorHandler.php, line 232
preg_match - [internal], line ??
Warninglist::__evalRegex() - APP/Model/Warninglist.php, line 738
Warninglist::checkValue() - APP/Model/Warninglist.php, line 669
WarninglistsController::checkValue() - APP/Controller/WarninglistsController.php, line 497
ReflectionMethod::invokeArgs() - [internal], line ??
Controller::invokeAction() - APP/Lib/cakephp/lib/Cake/Controller/Controller.php, line 500
Dispatcher::_invoke() - APP/Lib/cakephp/lib/Cake/Routing/Dispatcher.php, line 193
Dispatcher::dispatch() - APP/Lib/cakephp/lib/Cake/Routing/Dispatcher.php, line 167
[main] - APP/webroot/index.php, line 107

preg_match_all would be more appropriate for the author's intended use, though this does not appear to be a part of the warninglist model's execution pipeline.

It looks like this would need to be fixed here: https://github.com/MISP/misp-warninglists/blob/main/tools/generate_phone_numbers.py

When querying the warninglists endpoint with a lot of indicators, this can cause as much as a 5-6x increase in execution time. as an example, 70k indicators took 1 minute with this warninglist enabled, 11 seconds with it disabled. i suspect this is due to php having to write 70k errors to the log, and perhaps reinitialise a portion of each worker once preg_match fails 70k times.