fix(anvil): set auto-unlock an alias of auto-impersonate (#9256)

* fix(anvil): alias --auto-unlock of auto-impersonate

Signed-off-by: jsvisa <delweng@gmail.com>

* feat(anvil): add more clear help messge for auto-impersonate

Signed-off-by: jsvisa <delweng@gmail.com>

---------

Signed-off-by: jsvisa <delweng@gmail.com>

crates/anvil/src/cmd.rs

@@ -561,8 +561,9 @@ pub struct AnvilEvmArgs {
     #[arg(long, visible_alias = "no-console-log")]
     pub disable_console_log: bool,
 
-    /// Enable autoImpersonate on startup
-    #[arg(long, visible_alias = "auto-impersonate")]
+    /// Enables automatic impersonation on startup. This allows any transaction sender to be
+    /// simulated as different accounts, which is useful for testing contract behavior.
+    #[arg(long, visible_alias = "auto-unlock")]
     pub auto_impersonate: bool,
 
     /// Run an Optimism chain