chore(ci): Drop benches workflow and topology benches (#10577)

* chore(ci): Drop benches workflow and topology benches

We originally added this workflow when we thought we'd be leveraging the
criterion benchmarks as the primary benchmarks we'd use to control
regression and improve performance; however, the new soak test framework
has taken this over to much better effect.

The microbenches are still useful for digging in when the top-line soak
tests show a performance differences so we leave these (and test them as
part of the `test.yml` workflow), but I dropped the topology benches here
as they are redundant with the soak tests.

Signed-off-by: Jesse Szwedko <jesse@szwedko.me>

* Remove topology benches

Signed-off-by: Jesse Szwedko <jesse@szwedko.me>