HIP: Switch to std::vector in rocblas version check (#11820)

ggml/src/ggml-cuda/ggml-cuda.cu

@@ -178,11 +178,11 @@ static ggml_cuda_device_info ggml_cuda_init() {
         int major_version = 0;
         size_t version_length = 0;
         if (rocblas_get_version_string_size(&version_length) == rocblas_status_success) {
-            std::string version(version_length, '\0');
+            std::vector<char> version(version_length+1, '\0');
             if (rocblas_get_version_string(version.data(), version.size()) == rocblas_status_success) {
-                version.resize(::strlen(version.c_str()));
+                version.resize(::strlen(version.data()));
                 int parsed_value = 0;
-                if (std::from_chars(version.c_str(), version.c_str() + version.length(), parsed_value).ec == std::errc()) {
+                if (std::from_chars(version.data(), version.data() + version.size(), parsed_value).ec == std::errc()) {
                     major_version = parsed_value;
                 }
             }