chore: changing the private key for contract deployment

Ticket: WIN-7140

Author: prithvishet2503

hardhat.config.ts

@@ -179,11 +179,19 @@ const config: HardhatUserConfig = {
     },
     tbaseeth: {
       url: 'https://sepolia.base.org',
-      accounts: [`${TESTNET_PRIVATE_KEY_FOR_CONTRACT_DEPLOYMENT}`]
+      accounts: [
+        `${PRIVATE_KEY_FOR_V4_CONTRACT_DEPLOYMENT}`,
+        `${PLACEHOLDER_KEY}`,
+        `${PRIVATE_KEY_FOR_BATCHER_CONTRACT_DEPLOYMENT}`
+      ]
     },
     baseeth: {
       url: 'https://mainnet.base.org/',
-      accounts: [`${MAINNET_PRIVATE_KEY_FOR_CONTRACT_DEPLOYMENT}`]
+      accounts: [
+        `${PRIVATE_KEY_FOR_V4_CONTRACT_DEPLOYMENT}`,
+        `${PLACEHOLDER_KEY}`,
+        `${PRIVATE_KEY_FOR_BATCHER_CONTRACT_DEPLOYMENT}`
+      ]
     },
     tbera: {
       url: `https://rockbeard-eth-cartio.berachain.com/`,