fix(EOF): add DATACOPY copy gas

[rakita]

Added missing gas for copy operation of datacopy

[github-actions]

Valgrind Results:

==3781== Cachegrind, a cache and branch-prediction profiler
==3781== Copyright (C) 2002-2017, and GNU GPL'd, by Nicholas Nethercote et al.
==3781== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==3781== Command: target/release/snailtracer
==3781== 
--3781-- warning: L3 cache found, using its data for the LL simulation.
Running snailtracer example!
elapsed: 1.851904119s
==3781== 
==3781== I   refs:      430,650,669
==3781== I1  misses:          4,636
==3781== LLi misses:          2,812
==3781== I1  miss rate:        0.00%
==3781== LLi miss rate:        0.00%
==3781== 
==3781== D   refs:      202,360,206  (131,535,527 rd   + 70,824,679 wr)
==3781== D1  misses:        341,481  (    201,689 rd   +    139,792 wr)
==3781== LLd misses:        137,821  (      4,329 rd   +    133,492 wr)
==3781== D1  miss rate:         0.2% (        0.2%     +        0.2%  )
==3781== LLd miss rate:         0.1% (        0.0%     +        0.2%  )
==3781== 
==3781== LL refs:           346,117  (    206,325 rd   +    139,792 wr)
==3781== LL misses:         140,633  (      7,141 rd   +    133,492 wr)
==3781== LL miss rate:          0.0% (        0.0%     +        0.2%  )