bug: @helia/block-brokers session do not propagate provider option for http trustless gateway

I noticed while trying to use `?provider` query parameter with `@helia/verified-fetch` that it does not get propagated to the block brokers, specifically to the trustless gateway in the same way as when one sets a gateway in the `@helia/verified-fetch` config. Resulting in basically being ignore.

This hack https://github.com/ipfs/helia/pull/815/files made it work for me, but I believe it may exist a better solution that I am not aware at the moment.

Thoughts @achingbrain