add Enzyme timings to `-ftime-trace` reports (#1892) #5471

Job	Run time
Enzyme CI LLVM 11 Release ubuntu-20.04	4m 52s
Enzyme CI LLVM 11 Debug ubuntu-20.04	4m 2s
Enzyme CI LLVM 12 Release macOS	4m 15s
Enzyme CI LLVM 12 Release ubuntu-20.04	4m 47s
Enzyme CI LLVM 12 Debug macOS	3m 23s
Enzyme CI LLVM 12 Debug ubuntu-20.04	4m 4s
Enzyme CI LLVM 13 Release macOS	4m 8s
Enzyme CI LLVM 13 Release ubuntu-20.04	4m 34s
Enzyme CI LLVM 13 Debug macOS	3m 28s
Enzyme CI LLVM 13 Debug ubuntu-20.04	4m 1s
Enzyme CI LLVM 14 Release macOS	3m 59s
Enzyme CI LLVM 14 Release ubuntu-20.04	5m 5s
Enzyme CI LLVM 13 Release macOS XCode	4m 50s
Enzyme CI LLVM 14 Debug macOS	2m 58s
Enzyme CI LLVM 14 Debug ubuntu-20.04	4m 33s
Enzyme CI LLVM 15 Release macOS	4m 18s
Enzyme CI LLVM 15 Release ubuntu-20.04	4m 56s
Enzyme CI LLVM 15 Debug macOS	3m 34s
Enzyme CI LLVM 15 Debug ubuntu-20.04	4m 5s
Enzyme CI LLVM 16 Release macOS	3m 42s
Enzyme CI LLVM 16 Release ubuntu-20.04	4m 57s
Enzyme CI LLVM 16 Debug macOS	2m 46s
Enzyme CI LLVM 16 Debug ubuntu-20.04	4m 21s
	1h 35m 38s

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