[SYCL] Query device timestamp from UR for submission time (#21436)
Remove submission time calculation via base device timestamp and host
time delta. Such calculation is unreliable because of the clock drift
between device and host and inevitably leads to breaking the
specification requirement that submit time must be <= start time. Even
though querying device timestamp from UR presumably costs more, it
doesn't make sense to have an optimization that breaks correctness,
considering that submission time recording is done only when queue has
profiling enabled.
