frr: remove erroneous outfunc from frr-reload command

frr: remove erroneous outfunc from frr-reload command

Prior to the upgrade to frr-pythontools 10.2.1, frr-reload.py did not
print any output to STDOUT, which masked the erroneous outfunc
provided in run_command. With 10.2.1 frr-reload.py now prints to
STDOUT, which triggers the codepath for invoking the outfunc, leading
to an error when invoking frr-reload.py. By removing the outfunc the
invocation works again.

In addition to fixing the regression introduced, we also now print the
frr-reload.py informational output to the tasklog, which can be
helpful in debugging any issues when reloading the frr configuration.

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>