#1649 Leak query counter name to improve QueryCounter performance

[justinweng-instaclustr]

Stores QueryCounter's counter_name as &'static str (i.e., leaks the counter_name string so that its memory allocation is not freed for the lifetime of the shotover process. This should improve shotover performance as it reduces cloning.

We can observe minor improvement in query_counter benchmark regarding allocating and freeing memory.

Progress towards #1649.

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #1669 will not alter performance

_{Comparing justinweng-instaclustr:1649-leak-query-counter-name (a83ec27) with main (b540be8)}

Summary

✅ 38 untouched benchmarks