Switch to AXI4 and offline difftest #2830

Job	Run time
Generate test plan	7s
Test elaborate	4m 10s
Build trace emulator (blastoise)	7m 21s
Build Emulators (blastoise)	4m 25s
Build trace emulator (machamp)	17m 2s
Build Emulators (machamp)	6m 27s
Build trace emulator (sandslash)	42m 35s
Build Emulators (sandslash)	13m 29s
Request physical design report	0s
Prepare for running testcases	0s
Run testcases	0s
Report CI result	39s
	1h 36m 15s

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