chore(weave): Implement end-to-end streaming of calls (weave)

[tssweeney]

Introduces a new streaming method off of the batched server: calls_query_stream which is consumed in https://github.com/wandb/core/pull/21428. This method returns calls as an iterator, and importantly, fetches rows from clickhouse using a chunked stream. This means that we no longer need to load the entire results in memory to serve it to the user!

[circle-job-mirror[bot]]

Preview this PR with FeatureBee: https://beta.wandb.ai/?betaVersion=078c621837142e118971f1f716bf096000e3738c