[#8744] docdb: Fix yb-admin arg count for disable_tablet_splitting

Summary: disable_tablet_splitting requires 2 arguments, but we currently only validate that at least one is passed.

Test Plan: Run disable_tablet_splitting with yb-admin with 1 argument. The command should fail.

Reviewers: jhe

Reviewed By: jhe

Subscribers: ybase

Differential Revision: https://phorge.dev.yugabyte.com/D32728

src/yb/tools/yb-admin_cli.cc

@@ -1107,7 +1107,7 @@ Status split_tablet_action(const ClusterAdminCli::CLIArguments& args, ClusterAdm
 const auto disable_tablet_splitting_args = "<disable_duration_ms> <feature_name>";
 Status disable_tablet_splitting_action(
     const ClusterAdminCli::CLIArguments& args, ClusterAdminClient* client) {
-  if (args.size() < 1) {
+  if (args.size() < 2) {
     return ClusterAdminCli::kInvalidArguments;
   }
   const int64_t disable_duration_ms = VERIFY_RESULT(CheckedStoll(args[0]));