[SYCL][Bindless][E2E] Add missing wait in test between copy and verification (#18111)
Fixes #16923 'example_1_1D_read_write.cpp' has a sporadic failure on
battlemage where it fails to validate the data. This is likely due to a
missing 'q.wait_and_throw()' between copying the data from the device to
host and verifying it. Adding the wait should fix this failure.