feat: remove LOADW2 and STOREW2

[yi-sun]

Closes INT-2622

[jonathanpwang]

LGTM

[github-actions]

Benchmarks

group	app_log_blowup	app_total_cells_used	app_total_cycles	app_total_proof_time_ms	leaf_log_blowup	leaf_total_cells_used	leaf_total_cycles	leaf_total_proof_time_ms	max_segment_length	instance	alloc
ecrecover_program	2	15,230,037	290,016	(-24.0 [-1.0%]) 2,368.0	2	(+25,154,202 [+5.6%]) 470,764,600	(+1,831,426 [+18.7%]) 11,607,697	(+13,551.0 [+38.9%]) 48,429.0	1048476	64cpu-linux-arm64	mimalloc
fibonacci_program	2	51,505,102	1,500,137	(+65.0 [+1.2%]) 5,537.0	2	(+8,591,722 [+6.7%]) 137,453,288	(+650,462 [+20.5%]) 3,823,151	(-551.0 [-4.0%]) 13,248.0	1048476	64cpu-linux-arm64	mimalloc
regex_program	2	165,028,173	4,190,904	(+48.0 [+0.3%]) 15,714.0	2	(+16,486,742 [+5.7%]) 307,759,387	(+1,220,987 [+18.7%]) 7,742,359	(-1,061.0 [-3.9%]) 25,925.0	1048476	64cpu-linux-arm64	mimalloc
verify_fibair	2	(+51,066 [+0.6%]) 8,063,828	(+30,098 [+15.5%]) 224,837	(-85.0 [-5.9%]) 1,365.0	-	-	-	-	1048476	64cpu-linux-arm64	mimalloc

E2E Benchmarks

group	app_log_blowup	app_total_cells_used	app_total_cycles	app_total_proof_time_ms	leaf_log_blowup	leaf_total_cells_used	leaf_total_cycles	leaf_total_proof_time_ms	root_log_blowup	root_total_cells_used	root_total_cycles	root_total_proof_time_ms	internal_log_blowup	internal_total_cells_used	internal_total_cycles	internal_total_proof_time_ms	max_segment_length	instance	alloc
fib_e2e	2	410,820,430	12,000,137	35,750.0	2	145,159,663	4,156,979	113,155.0	2	816,551,895	22,762,015	80,352.0	2	1,789,365,347	51,503,203	195,760.0	1048476	64cpu-linux-arm64	mimalloc

Commit: 8062061

Benchmark Workflow