chore: fix benchmark tests

[damiannolan]

Gives love to benchmarks.

• Adds a single build flag benchmarks instead of two different ones
• Adjusts the make target to actually run benchmarks
• Adjusts tests to account for deliverTx -> finalizeBlock
• Fixes some test structure and compilation errors which exists pre-upgrade
• Refactors PFB half second test to use a binary search based approach.

Ideally the results.md file could be replaced by some prettified markdown output from the benchmark tests

[damiannolan]

currently looking at BenchmarkProcessProposal_PFB_Half_Second as it seems to run indefinitely

[damiannolan]

I reworked this test to use a binary search based approach, as I found that when I was running these locally and trying to debug with the upgrade to v0.50 that in some instances the txNum would keep oscillating back and forth and wouldn't be able to hit within the bounds.

It seems to work nice enough now. The benchmark doesn't take quite as long to run, in some random instances it can hit the case where it won't find a ProcessProp time at the target but at least it does not run indefinitely, and running the bench again will normally succeed.
It could probably be further reworked to never hit this, but I didn't want to introduce too many changes. You will never get a deterministic ProcessProp time from what I can see.

[evan-forbes]

dope! thanks for fixing these

since the app PR is huge I think simply waiting to merge this would be beneficial, however I'll defer to others if they have a strong opinion