Solana upgrade (#286)

Beware! Ahead there's only madness... 

## Greptile Summary

Based on the extensive changes shown, I'll provide a concise summary of
this major Solana upgrade pull request:

This PR represents a significant overhaul of the MagicBlock validator's
Solana integration, focusing on upgrading from Solana 1.19.0 to 2.1.11.
Here are the key points:

- Removes local implementations of Solana components (accounts-db,
geyser-plugin-manager, storage-proto) in favor of using official Solana
crates
- Simplifies accounts database to focus on in-memory cache storage,
removing complex persistence logic
- Updates transaction processing to use newer Solana SVM and runtime
components
- Modifies dependency versions and configurations, including some
concerning downgrades of tokio and tonic



Co-authored-by: Thorsten Lorenz <thlorenz@gmx.de>
Co-authored-by: Gabriele Picco <piccogabriele@gmail.com>

Author: 3 people

.github/actions/setup-solana/action.yml

@@ -7,7 +7,7 @@ runs:
       - name: Install Solana Test Validator
         shell: "bash"
         run: |
-          sh -c "$(curl -sSfL https://release.anza.xyz/v1.18.26/install)"
+          sh -c "$(curl -sSfL https://release.anza.xyz/v2.1.11/install)"
           echo "$HOME/.local/share/solana/install/active_release/bin" >> $GITHUB_PATH
 
       - name: Ensure Solana Test Validator is Installed