ci: benchmark only BenchmarkBenchdata

[thehowl]

A bit radical, but I'm open to other benchmarks we should include.

Essentially, in an effort to have a small amount of meaningful benchmarks, I'd like for these to only be those in BenchmarkBenchdata. Yes, I recognize this is tooting my own horn, but I think they are good benchmarks that tell us, overall, if the GnoVM on a few reference programs got slower or faster, and I found them useful in the past while doing manual execution.

Most other benchmarks are micro-benchmarks, which aren't likely to change often or to give us useful insight. I'm open to suggestions for others that make sense to be tracked, but I think it's for the better if we keep the number low so the CI for benchmarks can run in just a few minutes.

[codecov]

Codecov Report

Attention: Patch coverage is 84.74576% with 9 lines in your changes missing coverage. Please review.

Project coverage is 63.38%. Comparing base (520195e) to head (81d6dea).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
gnovm/pkg/gnolang/uverse.go	80.00%	4 Missing ⚠️
gno.land/pkg/keyscli/run.go	66.66%	1 Missing ⚠️
gno.land/pkg/sdk/vm/keeper.go	0.00%	1 Missing ⚠️
gnovm/pkg/gnolang/machine.go	75.00%	1 Missing ⚠️
gnovm/pkg/gnolang/nodes.go	83.33%	1 Missing ⚠️
gnovm/pkg/gnolang/store.go	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3007      +/-   ##
==========================================
- Coverage   63.38%   63.38%   -0.01%     
==========================================
  Files         565      566       +1     
  Lines       79461    79490      +29     
==========================================
+ Hits        50364    50382      +18     
- Misses      25703    25716      +13     
+ Partials     3394     3392       -2     

Flag	Coverage Δ
contribs/gnodev	60.57% <ø> (ø)
contribs/gnofaucet	14.82% <ø> (ø)
gno.land	67.37% <77.77%> (ø)
gnovm	67.87% <85.10%> (+<0.01%)	⬆️
misc/genstd	79.72% <ø> (ø)
tm2	62.46% <100.00%> (+0.04%)	⬆️

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