(CAT-2128) Remove `json_pure` dependency #834

Job	Run time
spec (ruby 2.7) / spec	56s
spec (ruby 3.2) / spec	58s
acceptance (ruby 2.7 \| windows-2019) / acceptance	30m 32s
acceptance (ruby 3.2 \| ubuntu-latest) / acceptance	13m 2s
acceptance (ruby 3.2 \| windows-2019) / acceptance	8m 17s
acceptance (ruby 2.7 \| ubuntu-latest) / acceptance	13m 43s
	1h 7m 28s

Provide feedback