Replace tidy3d.plugins.mode.web::run_batch with the native web.Batch

[momchil-flex]

Many notebooks have been converted to use the run_batch function that was specifically implemented for the mode solver. However, this turns out to be unstable in some cases as it can e.g. open too many connections and time out. Now that the native web.Batch is enabled for the mode solver in 2.8, we should convert the examples to use that (and make sure all works fine).

@tomflexcompute who should take this?

[tomflexcompute]

Yeah good to switch. I'll modify the notebooks and push a PR. I think there are only a few notebooks using run_batch right? Are you aware of any?

[momchil-flex]

I noticed that quite a lot turned up in this search which is why I made this issue. I assume at some point someone incorporated it, maybe @prashkh .

https://docs.flexcompute.com/projects/tidy3d/en/latest/search.html?q=mode+run_batch

[tomflexcompute]

Oh yeah it's more than I thought. I'll change it. Do we have a timeline for 2.8.0 release?

[momchil-flex]

Will be wrapping 2.8.0rc2 up soon but then we want to let it get well tested before official 2.8.0, so not soon. Maybe end of February.

[tomflexcompute]

Sounds good most people will still be in 2.7 for a while and I can update it before the 2.8 release.