feat: Implement Historical Backfill using Bitmap Indexer

[darunrs]

Replaces Delta Lake Stream with Bitmap Indexer Stream as the method for backfilling matching block heights before switching to real time processing. Bitmap Indexer resolves many issues the Delta Lake approach had:

1. Can be extended more easily.
2. Can be queried much faster thanks to storage in a database as well as in a compressed format.
3. Queries can be customized, enabling better matching.
4. Supports wildcard contract filters much better than the previous approach.
5. Is much harder to overload with too much data, which was a problem with the previous approach.

[darunrs]

For some reason I kept getting an error from the mock saying the function has no matching expectation, even though it is never used. I had no choice but to keep it in, which felt odd as a default mock should have a default expect for each function right? Maybe I'm doing something wrong?

[morgsmccauley]

Updates:

• Did some minor clean up, mostly clippy lints
• Use graphql endpoint from env rather than hard code
• Rename BitmapProcessor to ReceiverBlocksProcessor to align with indexer name, adjusted file system to accommodate
• Merged main and resolved conflicts