Support ad-hoc genesis args in run.sh (#9697)

automerge

run.sh

@@ -63,6 +63,7 @@ fi
 if [[ -e "$ledgerDir"/genesis.bin || -e "$ledgerDir"/genesis.tar.bz2 ]]; then
   echo "Use existing genesis"
 else
+  # shellcheck disable=SC2086
   solana-genesis \
     --hashes-per-tick sleep \
     --faucet-pubkey "$dataDir"/faucet.json \
@@ -72,7 +73,8 @@ else
       "$dataDir"/validator-vote-account.json \
       "$dataDir"/validator-stake-account.json \
     --ledger "$ledgerDir" \
-    --operating-mode development
+    --operating-mode development \
+    $SOLANA_RUN_SH_GENESIS_ARGS
 fi
 
 abort() {