Add equality operator for JsonValue #2668

Job	Run time
Documentation	12m 3s
windows-2022 / Debug	25m 20s
ubuntu-22.04 / gcc / Debug	21m 8s
Quick Checks	8s
windows-2022 / RelWithDebInfo	29m 9s
ubuntu-22.04 / gcc / RelWithDebInfo	27m 37s
ubuntu-20.04 / clang / Debug	20m 46s
ubuntu-20.04 / clang / RelWithDebInfo	26m 19s
macos-15 / clang / Debug	1h 23m 3s
macos-15 / clang / RelWithDebInfo	1h 13m 8s
	5h 18m 41s

Provide feedback