[osquery:experimental] 4 new commits by Alexander Kindyakov:

<https://github.com/facebook/osquery/commit/59437ee9a52fcd83569c26618446ad3c8b904979|59437ee>

std::getenv doesn't work for windows sometimes, let's use osquery::getEnvVar instead - Alexander Kindyakov

<https://github.com/facebook/osquery/commit/40a4276b4d818c0ccdfc96e13dc27c1afa6291ec|40a4276>

Fix up windows (cygwin) specific problem in carver tests (#5437) - Alexander Kindyakov

<https://github.com/facebook/osquery/commit/70d1e25cb2d962cbd5fa15ad26f6e9e7a7378760|70d1e25>

Move setting up routine of output channels inside LinuxProbesControl class (#5428) - Alexander Kindyakov

<https://github.com/facebook/osquery/commit/e7d1a56cfc879dfda41d741a434db840fe874864|e7d1a56>

Rename syscall::Type to syscall::EventType (#5429) - Alexander Kindyakov