Do not drop the task_manager for benchmarking stuff (#12147)

We can not drop the `task_manager` for benchmarking stuff, because otherwise stuff that may needs
this feature (like background signature verification) will fail. Besides the base path setup is
moved to `SharedParams` directly. Meaning any call to `base_path` will now directly return a tmp
path when `--dev` is given.

substrate/client/cli/src/commands/insert_key.rs

@@ -60,7 +60,7 @@ impl InsertKeyCmd {
 		let suri = utils::read_uri(self.suri.as_ref())?;
 		let base_path = self
 			.shared_params
-			.base_path()
+			.base_path()?
 			.unwrap_or_else(|| BasePath::from_project("", "", &C::executable_name()));
 		let chain_id = self.shared_params.chain_id(self.shared_params.is_dev());
 		let chain_spec = cli.load_spec(&chain_id)?;

substrate/client/cli/src/commands/run_cmd.rs

@@ -485,7 +485,7 @@ impl CliConfiguration for RunCmd {
 		Ok(if self.tmp {
 			Some(BasePath::new_temp_dir()?)
 		} else {
-			match self.shared_params().base_path() {
+			match self.shared_params().base_path()? {
 				Some(r) => Some(r),
 				// If `dev` is enabled, we use the temp base path.
 				None if self.shared_params().is_dev() => Some(BasePath::new_temp_dir()?),