Update(tests): add a couple more perf tests
- AllocDeallocMT -> AllocDeallocMTLongLived (biases Get, then Free operations), Avg: 3.56901ms
- AllocDeallocMTShortLived - fetches and returns to pool immediately (to evenly spread pressure), Avg: 3.01974ms
- AllocDeallocMPSC - simulates multiple-producers-single-consumer (emulates network write thread under jobs 2) Avg: 12.20773ms
All cases - 32 tasks doing 1k allocs
Tests: ran perf tests