n-api: detect deadlocks in thread-safe function

We introduce status `napi_would_deadlock` to be used as a return status
by `napi_call_threadsafe_function` if the call is made with
`napi_tsfn_blocking` on the main thread and the queue is full.

Fixes: https://github.com/nodejs/node/issues/32615


Signed-off-by: Gabriel Schulhof <gabriel.schulhof@intel.com>
PR-URL: https://github.com/nodejs/node/pull/32860


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Zeyu Yang <himself65@outlook.com>