fix(http): handle getHttpProtocol being unset in $_SERVER['SERVER_PROTOCOL'] if called from occ

[tcitworld]

Due to the profiler app loading HttpDataCollector when running occ.

This won't change behavior, fallback value is still 'HTTP/1.1' (but the error of missing SERVER_PROTOCOL won't be shown though).

Similar issue at nextcloud/profiler#637

An unhandled exception has been thrown:
ErrorException: Undefined array key "SERVER_PROTOCOL" in server/lib/private/AppFramework/Http/Request.php:679
Stack trace:
#0 server/lib/private/AppFramework/Http/Request.php(679): OCA\Files\Command\ScanAppData->exceptionErrorHandler()
#1 server/apps/profiler/lib/DataCollector/HttpDataCollector.php(30): OC\AppFramework\Http\Request->getHttpProtocol()
#2 server/lib/private/Profiler/Profiler.php(69): OCA\Profiler\DataCollector\HttpDataCollector->collect()
#3 server/console.php(98): OC\Profiler\Profiler->collect()
#4 server/occ(33): require_once('...')
#5 {main}%        

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)