Add nicer error messages for sparse #3974

Job	Run time
Enzyme CI LLVM 11 Release ubuntu-20.04	5m 46s
Enzyme CI LLVM 11 Debug ubuntu-20.04	3m 29s
Enzyme CI LLVM 11 Release macOS	9m 3s
Enzyme CI LLVM 12 Release ubuntu-20.04	5m 50s
Enzyme CI LLVM 11 Debug macOS	6m 27s
Enzyme CI LLVM 12 Debug ubuntu-20.04	4m 0s
Enzyme CI LLVM 13 Release ubuntu-20.04	5m 52s
Enzyme CI LLVM 12 Release macOS	7m 22s
Enzyme CI LLVM 13 Release macOS XCode	2m 42s
Enzyme CI LLVM 13 Debug ubuntu-20.04	3m 59s
Enzyme CI LLVM 12 Debug macOS	5m 41s
Enzyme CI LLVM 14 Release ubuntu-20.04	4m 41s
Enzyme CI LLVM 13 Release macOS	9m 39s
Enzyme CI LLVM 14 Debug ubuntu-20.04	3m 41s
Enzyme CI LLVM 13 Debug macOS	3m 41s
Enzyme CI LLVM 15 Release ubuntu-20.04	7m 25s
Enzyme CI LLVM 14 Release macOS	7m 18s
Enzyme CI LLVM 15 Debug ubuntu-20.04	6m 48s
Enzyme CI LLVM 14 Debug macOS	5m 49s
Enzyme CI LLVM 16 Release ubuntu-20.04	7m 4s
Enzyme CI LLVM 15 Release macOS	18m 27s
Enzyme CI LLVM 16 Debug ubuntu-20.04	6m 21s
Enzyme CI LLVM 15 Debug macOS	7m 46s
	2h 28m 51s

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