[YCQL] YCQLSH noticeably slows down output when outputting large jsonb column values that contain certain characters about cqlsh HOT 3 CLOSED

It appears that this is due to this line of formatting code that is meant to replace unicode control characters at the YCQLSH level through expensive regex operations. However, the list of unicode control characters here seems too liberal. This says that characters such as 0 and . need to be replaced even though in reality they can be cleanly displayed in YCQLSH. It would seem that real control characters would start from 0x00 to 0x1F according to this. After fixing this locally, the issue seems to go away.

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excellent find/debugging @tanujnay112

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I am observing the same timing disparity with the main CQLSH repo.

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