[26] allow printing log messages during occ

[icewind1991]

Backport of #873

• requires [stable26] emit an event when a message is logged server#38815

[blizzz]

BeforeMessageLoggedEvent was introduced in 27.0.1 only

(that's what the require is about, just blocking to avoid accidental merge)

Resolved

[blizzz]

CI is failing

ERROR: InvalidArgument - lib/Listener/LogListener.php:58:62 - Argument 3 of OCA\LogReader\Log\Console::log expects array<array-key, mixed>, but string provided (see https://psalm.dev/004)
$this->console->log($event->getLevel(), $event->getApp(), $event->getMessage());

I would have expected this on the master and 27 PRs as well, but there it didn't appear.

[susnux]

@blizzz on master & stable27 the typing of BeforeMessageLoggedEvent is correct, but for stable26 the typing of getMessage() is string instead of array.

[susnux]

Backport here: https://github.com/nextcloud/server/pull/41357/files