feat: E2 supports suspension & VmExecState supports clone

[nyunyunyunyu]

• E2 execution supports suspension every segment. Reth-benchmark doesn't show performance difference.
• VmExecState/VmState supports clone. Benchmark shows cloning a VM state which only uses address space 2 takes 0.3~0.6ms.

closes INT-5066
closes INT-5067

[shuklaayush]

some small comments
a general comment not for this pr is that we should try to make some of these config parameters const generic in the future to avoid runtime overhead

[nyunyunyunyu]

some small comments a general comment not for this pr is that we should try to make some of these config parameters const generic in the future to avoid runtime overhead

Actually we use MeteredCtx everywhere and all the places don't really use PAGE_BITS as a generic. I tried it but it touches too many places so I think we probably should change this later.

[shuklaayush]

lgtm. just add a note that the VmExecState returned by execute_metered_from_state_until_suspension is not at segment boundary but something slightly beyond that

[github-actions]

group	app.proof_time_ms	app.cycles	app.cells_used	leaf.proof_time_ms	leaf.cycles	leaf.cells_used
verify_fibair	(-6 [-2.2%]) 266	322,610	2,058,654	-	-	-
fibonacci	(+4 [+0.3%]) 1,219	1,500,210	2,107,962	-	-	-
regex	(+90 [+3.0%]) 3,051	4,108,483	17,662,886	-	-	-
ecrecover	(-16 [-1.8%]) 872	140,497	2,275,056	-	-	-
pairing	(+10 [+0.6%]) 1,775	1,882,939	25,847,762	-	-	-

Commit: 34ba555

Benchmark Workflow