Fix ASV imports
#22947 broke the ASV - second time in a few days that linting the benchmarks has broken something (see #22978 / #22886)

@datapythonista, could you please require that PRs try
```
cd asv_bench
asv dev
```
to see if *collection* of benchmark works? This takes about 30 seconds and then the asv run can be aborted with CTRL+C.
