This could have been done by simply running
GOOS=freebsd ./bin/golangci-lint run [options] ./...
on Linux, but some freebsd code is using cgo (i.e. is linked to C
libraries), so real freebsd environment is required.
This also fixes the issue of ignoring linter errors for Windows and
Darwin (exit 0), introduced by commit c9b108d5b38.
Fixes: c9b108d5b38 ("Bump golangci-lint to v2.0.2")
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>