increase the transaction throttling limit to allow >99% of transactions (#13047)

Co-authored-by: Matthew Slipper <me@matthewslipper.com>

op-batcher/flags/flags.go

@@ -171,7 +171,7 @@ var (
 	ThrottleTxSizeFlag = &cli.IntFlag{
 		Name:    "throttle-tx-size",
 		Usage:   "The DA size of transactions to start throttling when we are over the throttle threshold",
-		Value:   300, // most transactions compress to under 300 bytes. TODO: compute exact distribution
+		Value:   5000, // less than 1% of all transactions should be affected by this limit
 		EnvVars: prefixEnvVars("THROTTLE_TX_SIZE"),
 	}
 	ThrottleBlockSizeFlag = &cli.IntFlag{