Reduce Forest 🌲 Binary Size

[lerajk]

Download required files on demand:

• Genesis Files
• WASM for the actors

Tasks:

• [ ] Store calibnet genesis file in S3.
• [ ] Store mainnet genesis file in S3.
• [ ] ~Store actors v6 bundle file in S3~. Moved to separate issue.
• [ ] Add feature flag for inlining calibnet genesis file in forest binary.
• [ ] Add feature flag for inlining mainnet genesis file in forest binary.

[lemmih]

The size of the forest execution has gone down from roughly 100MB to 60MB on my machine. There's still room for improvement.

[lemmih]

The size of Forest has been reduced to 35MB. I think this is good enough for now as there's little low hanging fruit left.