Move genesis/snapshot archive download into Rust (#5515)

net/net.sh

@@ -66,7 +66,7 @@ Operate a configured testnet
                                       - Amount to fund internal nodes in genesis block.
    --external-accounts-file FILE_PATH
                                       - A YML file with a list of account pubkeys and corresponding lamport balances in genesis block for external nodes
-   --no-snapshot
+   --no-snapshot-fetch
                                       - If set, disables booting validators from a snapshot
    --skip-ledger-verify
                                       - If set, validators will skip verifying
@@ -139,7 +139,7 @@ while [[ -n $1 ]]; do
     elif [[ $1 = --lamports ]]; then
       genesisOptions="$genesisOptions $1 $2"
       shift 2
-    elif [[ $1 = --no-snapshot ]]; then
+    elif [[ $1 = --no-snapshot-fetch ]]; then
       maybeNoSnapshot="$1"
       shift 1
     elif [[ $1 = --no-deploy ]]; then