perf(lib_performance): add sysbench helper APIs

Add sysbench parsers for time_sec and mem_mbps metrics.
Add values helpers (append/avg) for iteration aggregation.
Add fifo-based tee runner and CSV append helper for KPIs.

Signed-off-by: Srikanth Muppandam <smuppand@qti.qualcomm.com>

Author: smuppand