chore: Accumulated backports to v3 (#19389)

This PR accumulates backport commits throughout the day and will be
auto-merged overnight.

Latest backport: #19386 - fix: enable testnet txs

🤖 This PR is managed automatically by the backport workflow.

Co-authored-by: alexghr <alexghr@users.noreply.github.com>

Author: AztecBot

yarn-project/cli/src/config/chain_l2_config.ts

@@ -299,7 +299,7 @@ export const testnetL2ChainConfig: L2ChainConfig = {
   testAccounts: false,
   sponsoredFPC: true,
   p2pEnabled: true,
-  disableTransactions: true,
+  disableTransactions: false,
   bootstrapNodes: [],
   minTxsPerBlock: 0,
   maxTxsPerBlock: 20,