Solana directory cleanup and build process improvement

[nonergodic]

• fixed compiler warnings
• removed superfluous try_deserialize code
• bumped anchor versions
• update documentation
• added list of further TODOs

overhauled build process:

• allow building/deploying for all networks and not just mainnet
• have a single source of truth for Wormhole program ids (Wormhole Makefile)
• automatically derive program ids of built programs
• include program ids in Rust code via environment variables / files to avoid hardcoding
• programmatically generate Anchor.toml with correct program ids
• fetch mpl_metadata program from metaplex repo instead of outdated version from Wormhole docker image
• check Solana version programmatically to avoid hard to debug erroneous behavior down the line

cleaned up TS tests:

• cut down code by ~2kloc
• got rid of unnecessarily hardcoded values