chore: refactor op e2e tests - part 5

[lesterli]

Summary

This PR adds the OP e2e test case TestFinalitySigSubmission as part of the refactor in #178

Test Plan

make lint
make test-e2e-op-filter FILTER=TestFinalitySigSubmission

    op_test_manager.go:127: [12:48:55.999] Started Consumer FP App
    op_test_manager.go:327: [12:49:03.294] Registered Finality Provider 3f0ed4bbe63cf80afa0830512329bdbc96eed4a318d81bbce68fdf745547a746 for op-stack-l2-706114
    base_test_manager.go:185: successfully submitted a BTC delegation
    base_test_manager.go:236: delegations are active
2024-12-04T12:49:28.892+0800    DEBUG   opstackl2/consumer.go:167       Successfully committed public randomness        {"fp_pk_hex": "3f0ed4bbe63cf80afa0830512329bdbc96eed4a318d81bbce68fdf745547a746", "start_height": 1, "num_pub_rand": 1000}
2024-12-04T12:49:33.931+0800    DEBUG   opstackl2/consumer.go:238       Successfully submitted finality signatures in a batch   {"fp_pk_hex": "3f0ed4bbe63cf80afa0830512329bdbc96eed4a318d81bbce68fdf745547a746", "start_height": 1, "end_height": 3}
    op_test_manager.go:399: Stopping test manager
--- PASS: TestFinalitySigSubmission (70.10s)
PASS
ok      github.com/babylonlabs-io/finality-provider/itest/opstackl2     71.846s