Fix Windows salt-master
Fix Windows salt-master

The salt-master on Windows was broken by PR #35703 due to the change in
how the ReqServer object was started in a new process. The new way
failed to correctly pickle/unpickle the args/kwargs. To fix this, we
use `__setstate__` and `__getstate__` similar to how other objects in
the same file handle it (such as the `Maintenance` object).

Signed-off-by: Sergey Kizunov <dfddabaa9af05982b01940b837a87844148069c9@ni.com>

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt