intel: allow reduced memory usage for INTEL_MEASURE

intel: allow reduced memory usage for INTEL_MEASURE

The default batch size was increased to support large numbers of
INTEL_MEASURE snapshots for complex workloads.  Some titles create
large numbers of small secondary command buffers, and quickly exhaust
memory.  An example of this is Dota2, where INTEL_MEASURE increases
the memory usage by a factor of 20.

Allow the user to specify smaller batch sizes and buffer sizes.

Reviewed-by: Felix DeGrood <felix.j.degrood@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24860>