Took hours to download mainnet-beta snapshot

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#### What is the outcome that you are trying to reach?

Reducing time to download snapshot
Downloading snapshot from known validator can take hours to finish since the speed is low.

#### Describe the solution you would like

1. Adding downloading snapshot in user-data script. Following is a sample script
```
cd /var/solana/data/ledger
wget --trust-server-names http://entrypoint3.mainnet-beta.solana.com/snapshot.tar.bz2
wget --trust-server-names http://entrypoint3.mainnet-beta.solana.com/incremental-snapshot.tar.bz2
sed -i "s/--log -/--no-snapshot-fetch --log -/g" /home/solana/bin/validator.sh
cd -
```

2. leverage https://github.com/c29r3/solana-snapshot-finder
3. TBD

#### Describe alternatives you have considered

#### Additional context

Start by locating the user-data script and the validator.sh path mentioned in the issue, then review how the mainnet-beta node is initialized. Compare the current startup flow with the supplied wget commands and the snapshot-finder alternative. Done means the documented or implemented startup path reduces snapshot download time without breaking validator startup.

Written by the indexing model from the issue text.