fix(test): add setup instruction to fp2 tests

[jonathanpwang]

@luffykai the modular (fp not fp2) tests weren't failing because they don't seem to use exprbuilder in the same way. Can you fix it?

[github-actions]

group	app.proof_time_ms	app.cycles	app.cells_used	leaf.proof_time_ms	leaf.cycles	leaf.cells_used
verify_fibair	(-14 [-0.4%]) 3,812	746,260	30,011,674	-	-	-
fibonacci_program	(-22 [-0.4%]) 6,044	1,500,137	51,505,102	-	-	-
regex_program	(-178 [-1.0%]) 18,332	4,190,904	165,028,173	-	-	-
ecrecover_program	(-37 [-1.4%]) 2,600	285,401	15,092,297	-	-	-

Commit: 3afe8a2

Benchmark Workflow