chore: start cockroach cluster with in-memory storage

[aqrln]

Ref: https://www.cockroachlabs.com/docs/stable/local-testing.html#use-a-local-single-node-cluster-with-in-memory-storage

[github-actions]

WASM Query Engine file Size

Engine	This PR	Base branch	Diff
Postgres	2.045MiB	2.045MiB	0.000B
Postgres (gzip)	822.198KiB	822.198KiB	0.000B
Mysql	2.013MiB	2.013MiB	0.000B
Mysql (gzip)	809.809KiB	809.809KiB	0.000B
Sqlite	1.909MiB	1.909MiB	0.000B
Sqlite (gzip)	769.304KiB	769.304KiB	0.000B

[codspeed-hq]

CodSpeed Performance Report

Merging #5034 will not alter performance

_{Comparing cockroach-in-mem (9550237) with main (feda6ce)}

Summary

✅ 11 untouched benchmarks