[DML] Test that destroys a generator, tweaks GeneratorParams and then creates another generator throws a KV_Cache exception

**Describe the bug**
A test that destroys, tweaks GeneratorParams, then creates another instance of a Generator throws a KV_Cache exception.
The error is reproducible only in DML builds

**To Reproduce**

```cpp
TEST(CAPITests, LoraManagement) {
#if defined(USE_CUDA)
const std::string model_folder = MODEL_PATH "hf-internal-testing/tiny-random-llama-lora-fp16";
#elif defined USE_DML
const std::string model_folder = MODEL_PATH "hf-internal-testing/tiny-random-llama-lora-fp16-dml";
#else
const std::string model_folder = MODEL_PATH "hf-internal-testing/tiny-random-llama-lora";
#endif

const std::string adapter_name = "guanaco";

// This should load Lora adapters as configured in the genai_config.json
auto model = OgaModel::Create(model_folder.c_str());

constexpr std::array input_ids_shape{2, 4};
constexpr std::array input_ids{0, 0, 0, 52, 0, 0, 195, 731};
const auto batch_size = input_ids_shape[0];
const auto input_sequence_length = input_ids_shape[1];
constexpr int max_length = 10;

const char* const adapter[] = {adapter_name.c_str()};
auto params = OgaGeneratorParams::Create(*model);
params->SetSearchOption("max_length", max_length);
params->SetInputIDs(input_ids.data(), input_ids.size(), input_sequence_length, batch_size);

// Now we can activate it
// The call validates the adapter names specified.
ASSERT_NO_THROW(params->SetActiveAdapterNames(adapter));

// Try to active a non-existing adapter throws, but preserves the previously set adapters

constexpr const std::array nonexisting_adapter = {"nonexistingadapter"};
ASSERT_THROW(params->SetActiveAdapterNames(nonexisting_adapter), std::runtime_error);

auto generator = OgaGenerator::Create(*model, *params);
ASSERT_NE(nullptr, generator);

generator.reset();

// Reset adapters to base
constexpr std::array base_adapter = {};
params->SetActiveAdapterNames(base_adapter);

generator = OgaGenerator::Create(*model, *params);
ASSERT_NE(nullptr, generator);
}
```

**Expected behavior**
No exception

**Screenshots**
If applicable, add screenshots to help explain your problem.


**Desktop (please complete the following information):**
- OS: Windows 11 fully patched
- ORT release 1.18.0 off GH releases page
- GenAI built off the tip
- DirectML 1.14.2
- Direct3d 12.1.614.1

**Additional context**
StaticBuffer instance `bytes_` appears to have a value of 0.

Start with the CAPITests.LoraManagement reproduction in a USE_DML build, then trace the lifecycle of OgaGenerator::Create after generator.reset() and the subsequent SetActiveAdapterNames call. Inspect the StaticBuffer bytes_ state and related KV_Cache handling. Done means the second generator is created without an exception and the regression is covered by the test.

Written by the indexing model from the issue text.