✨ [ClickBench] investigate poor performance in clickbench tests

[joocer]

they run locally in 8 sec, on AWS in 30 sec

[joocer]

initial investigation suggests two things:

• AWS c6a.XL4Large is just slower than M2 Pro Mac
• The reads are very slow - think this is essentially serial due to size of files

[joocer]

#1685 should improve performance

[joocer]

Pin and rerun benchmarks against 0.15.2, this has some performance improvements.