bench: add subcall benchmarks (1000-call variants) #3427

Performance Gate Passed

⚡ 2 improved benchmarks
✅ 171 untouched benchmarks
🆕 3 new benchmarks

	Benchmark	`BASE`	`HEAD`	Efficiency
⚡	`transfer`	14.1 µs	13.6 µs	+3.72%
🆕	`subcall_1000_transfer_1wei`	N/A	1.2 ms	N/A
🆕	`subcall_1000_nested`	N/A	2.1 ms	N/A
🆕	`subcall_1000_same_account`	N/A	1.1 ms	N/A
⚡	`transfer_finalize`	17.5 µs	17 µs	+3.39%

_{Comparing subcall-bench (cb82522) with main (0b34496)}