add CLP/µSlope to JSONBench

[CLP](https://github.com/y-scope/clp) in [μSlope](https://www.usenix.org/system/files/osdi24-wang-rui.pdf) says

> Our evaluation shows that µSlope achieves 21.9:1 to 186.8:1 compression ratio, which is at least a few times higher than any existing semi-structured data management systems (SSDMS); The compression ratio is 2.34x as high as Zstandard and the search speed is 5.77x of the other SSDMSes.

> µSlope’s search speed is 2.47x of ClickHouse’s, 8.09x of PostgreSQL’s, and 6.74x of MongoDB®’s.

It's interesting to look at its JSONBench results.