Update setting data pointers for Cython 3
Need to update the following locations

- [x] _libs/window/aggregations.pyx: `bufarr.data`
- [ ] _libs/reduction.pyx: `chunk.data`

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https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=34888&view=logs&j=33ccdd52-c922-5ef2-8209-78215e36d994&t=046ffbec-62c2-54e3-e88a-7745f4292bb6&l=457

just started failing.

cc @pandas-dev/pandas-core @pandas-dev/pandas-triage 

if anyone has insights