Commit Post integration test about builtin-actors

[ZenGround0]

Note the gas measurement tests existed to set params during hyperdrive last year. Other tests sufficiently cover these code paths that we can safely omit them.

[tyshko5]

i'll take TestBatchOnboarding

[ZenGround0]

TestCommitPoStFlow has three remaining subparts:

• "missed prove commit results in precommit expiry and cleanup"
• "skip sector"
• "missed first PoSt deadline"

Please comment below when taking one of these on

[arajasek]

I'm taking all 3

[anorth]

@tyshko5 @arajasek is this done, or are we missing TestBatchOnboarding?

[jennijuju]

builtin-actors/test_vm/tests/batch_onboarding.rs

Line 49 in 8c8cdb2

fn batch_onboarding() {