[stable2506] Backport #8838 (#9439)

Backport #8838 into `stable2506` from michalkucharczyk.

See the
[documentation](https://github.com/paritytech/polkadot-sdk/blob/master/docs/BACKPORT.md)
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Co-authored-by: Michal Kucharczyk <[email protected]>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Egor_P <[email protected]>

Author: 4 people

prdoc/pr_8838.prdoc

@@ -0,0 +1,7 @@
+title: '`fatxpool`: fork aware transaction pool is now default'
+doc:
+- audience: Node Operator
+  description: This PR changes the default transaction pool to the fork aware implementation. The old implementation can be still used with `--pool-type=single-state` command line argument.
+crates:
+- name: sc-cli
+  bump: minor

substrate/client/cli/src/params/transaction_pool_params.rs

@@ -57,7 +57,7 @@ pub struct TransactionPoolParams {
 	pub tx_ban_seconds: Option<u64>,
 
 	/// The type of transaction pool to be instantiated.
-	#[arg(long, value_enum, default_value_t = TransactionPoolType::SingleState)]
+	#[arg(long, value_enum, default_value_t = TransactionPoolType::ForkAware)]
 	pub pool_type: TransactionPoolType,
 }