Revert `is_sorted` removal, deprecate instead (#14388) #201

Job	Run time
cargo test hash collisions (amd64)	23m 35s
linux build test	4m 33s
Run sqllogictests with the sqlite test suite	1h 4m 37s
cargo test 'extended_tests' (amd64)	18m 31s
	1h 51m 16s

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