Upgrade to cppcheck 2.8 and fix new issues found (#1225)

* Upgrade to cppcheck 2.8

test/verify/run_verify.cpp

@@ -129,7 +129,6 @@ void run_verify::verify(const std::string& name, const migraphx::program& p) con
     auto_print::set_terminate_handler(name);
     if(migraphx::enabled(MIGRAPHX_DUMP_TEST{}))
         migraphx::save(p, name + ".mxr");
-    std::vector<std::pair<std::string, result_future>> results;
     std::vector<std::string> target_names;
     for(const auto& tname : migraphx::get_targets())
     {
@@ -145,6 +144,7 @@ void run_verify::verify(const std::string& name, const migraphx::program& p) con
     }
     if(not target_names.empty())
     {
+        std::vector<std::pair<std::string, result_future>> results;
         migraphx::parameter_map m;
         for(auto&& x : p.get_parameter_shapes())
         {

test/verify/test_conv_bias_clipped_relu.cpp

@@ -12,7 +12,6 @@ struct test_conv_bias_clipped_relu : verify_program<test_conv_bias_clipped_relu>
     {
         migraphx::program p;
         auto* mm = p.get_main_module();
-        std::vector<size_t> input_lens{4, 3, 3, 3};
         auto input =
             mm->add_parameter("x", migraphx::shape{migraphx::shape::float_type, {4, 3, 3, 3}});
         auto weights =