Move the MWLogger PSR-3 logging related classes into the
MediaWiki\Logger namespace. Create shim classes to ease migration of
existing MWLoggerFactory usage to the namespaced classes.
Bug: T93406
Change-Id: I359cc81fbd2dcf8937742311dcc7d3dee08747b0
The stock Monolog\Handler\SyslogUdpHandler only works with a specifically
tailored Formatter class and it's output cannot be fed directly into
Logstash's syslog input. This handler implements RFC 3164 in a way that
can be used with any Formatter and parsed directly by Logstash.
Bug: T88870
Change-Id: Ib098d5cb8fe9643742360bf51b54fc0e27996c0f