benchmarks one place to define

[andrewgazelka]

right now we are defining in two places

hyperion/.github/workflows/bench.yml

Line 18 in 8996474

benchmark: [ general ] # Add your benchmarks here

and

hyperion/.github/workflows/bench.yml

Line 43 in 8996474

benchmark: [ general ] # Add your benchmarks here

but it should be one place (so we are not in inconsistent state as
easily)

example bench:
#781