chore: move the validator key index start to 2000 (#12354)

No more "address reserved".

Services in tests were using account index 0, which is what the
validators also use.

spartan/aztec-network/values.yaml

@@ -48,19 +48,20 @@ aztec:
   epochDuration: 32 # how many L2 slots in an epoch
   proofSubmissionWindow: 64 # in L2 slots, from the start of the epoch to be proven
   realProofs: false
+
+  l1Salt: "42" # leave empty for random salt
+  testAccounts: true
   l1DeploymentMnemonic: "test test test test test test test test test test test junk" # the mnemonic used when deploying contracts
+
   # The derivation path of the calcualted private keys
   # Starting from this index, the number of keys is equal to the number of replicas for the given service
-  validatorKeyIndexStart: 0
-  proverKeyIndexStart: 1000
-
+  # Set the "extraAccounts" to start at 0 so that just using the default mnemonic won't clash with validator, prover, and bot accounts
+  extraAccountsStartIndex: 0
   ## The number of extra accounts to prefund
-  extraAccountsStartIndex: 2000
   extraAccounts: 10
-
+  proverKeyIndexStart: 1000
+  validatorKeyIndexStart: 2000
   botKeyIndexStart: 3000
-  l1Salt: "42" # leave empty for random salt
-  testAccounts: true
 
 bootNode:
   peerIdPrivateKey: ""

yarn-project/end-to-end/src/spartan/upgrade_rollup_version.test.ts

@@ -85,8 +85,6 @@ describe('spartan_upgrade_rollup_version', () => {
         ETHEREUM_HOSTS,
         config.L1_ACCOUNT_MNEMONIC,
         chain.chainInfo,
-        // TODO(#12301): magic number
-        2000,
       );
       debugLogger.info(`l1WalletClient: ${l1WalletClient.account.address}`);
       const initialTestAccounts = await getInitialTestAccounts();