If we pass a node to the provider thread that contains a provider
that was created in an STA with the ProviderOptions_UseComThreading
flag set, we can deadlock when attempting to get a runtime ID from the
proxy due to the message queue not being pumped. To avoid this, retrieve
the runtime ID before passing the node to the provider thread.
Signed-off-by: Connor McAdams <cmcadams@codeweavers.com>