fix: op e2e test

[lesterli]

Summary

This PR fixes the op e2e tests:

• only start one consumer FP
  • change the TestOpMultipleFinalityProviders to TestFinalityProviderLifeCycle
• check if FP exists before start FP to fix the FP already exists

Test Plan

make lint
make test
make test-e2e-op

[SebastianElvis]

Code wise lgtm. CI seems to be failed though

[lesterli]

CI seems to be failed though

Yes, it is weird that all unit tests were passed at my laptop.

Update: unit tests is successful this time.

no op e2e in CI, can we enable it?

[bap2pecs]

no op e2e in CI, can we enable it?

I checked the logs and it says "file /home/runner/work/finality-provider/finality-provider/itest/opstackl2/devnet-data/allocs-l1.json does not exist"

[bap2pecs]

I checked the logs and it says "file /home/runner/work/finality-provider/finality-provider/itest/opstackl2/devnet-data/allocs-l1.json does not exist"

cc @lesterli jfyi