fix clang Catch2 compile error

```
/builds/hzdr/crp/alpaka/test/unit/mem/view/src/ViewPlainPtrTest.cpp:112:1: error: passing no argument for the '...' parameter of a variadic macro is a C++20 extension [-Werror,-Wc++20-extensions]
  112 | TEMPLATE_TEST_CASE("createView", "[memView]", (std::array<float, 4>), std::vector<float>)
```

test/unit/mem/view/src/ViewPlainPtrTest.cpp

@@ -13,6 +13,7 @@
 #include <catch2/catch_template_test_macros.hpp>
 
 #include <numeric>
+#include <tuple>
 #include <type_traits>
 
 #if BOOST_COMP_GNUC
@@ -109,7 +110,9 @@ TEMPLATE_LIST_TEST_CASE("viewPlainPtrOperatorTest", "[memView]", alpaka::test::T
     alpaka::test::testViewPlainPtrOperators<TestType, float>();
 }
 
-TEMPLATE_TEST_CASE("createView", "[memView]", (std::array<float, 4>), std::vector<float>)
+using CreateViewTestTypes = std::tuple<std::array<float, 4>, std::vector<float>>;
+
+TEMPLATE_LIST_TEST_CASE("createView", "[memView]", CreateViewTestTypes)
 {
     using Dev = alpaka::DevCpu;
     auto const platform = alpaka::PlatformCpu{};

test/unit/vec/src/VecTest.cpp

@@ -10,6 +10,7 @@
 #include <catch2/catch_test_macros.hpp>
 
 #include <numeric>
+#include <tuple>
 #include <utility>
 
 namespace
@@ -469,7 +470,9 @@ TEST_CASE("accessByNameConstexpr", "[vec]")
     STATIC_REQUIRE(v4.w() == 4);
 }
 
-TEMPLATE_TEST_CASE("Vec generator constructor", "[vec]", std::size_t, int, unsigned, float, double)
+using VecGeneratorTestTypes = std::tuple<std::size_t, int, unsigned, float, double>;
+
+TEMPLATE_LIST_TEST_CASE("Vec generator constructor", "[vec]", VecGeneratorTestTypes)
 {
     // Define a generator function
     auto generator = [](auto index) { return static_cast<TestType>(index.value + 1); };