Fix Memory Issue GQA CPU Rotary (#22290)
### Description
In GQA there was a memory issue which was best described by @edgchen1
[here](https://github.com/microsoft/onnxruntime/issues/22252#issuecomment-2384559255)
> here's the problematic code:
>
>
https://github.com/microsoft/onnxruntime/blob/d9de054eb53034e3dc18c298e47c6cc08d5aa884/onnxruntime/contrib_ops/cpu/bert/group_query_attention.cc#L149-L157
>
> annotated:
>
> ```c++
> if (packed_qkv) {
> // Q is an OrtValue declared in the enclosing scope.
> OrtValue RotaryQKV;
> Tensor::InitOrtValue(element_type, TensorShape({batch_size, num_heads_
+ 2 * kv_num_heads_, sequence_length, head_size}), allocator,
RotaryQKV);
> // Save pointer to Q's data in q_input.
> q_input = Q.Get<Tensor>().Data<T>();
> k_input = q_input + num_heads_ * sequence_length * head_size;
> q_rotary = RotaryQKV.GetMutable<Tensor>()->MutableData<T>();
> k_rotary = q_rotary + num_heads_ * sequence_length * head_size;
> // Overwrite Q with RotaryQKV (OrtValues contain shared_ptr to
contained value).
> // Now, q_input is pointing to freed memory.
> Q = RotaryQKV;
> }
> ```
>
> later on, when we use `q_input`, there is a read access violation.
>
>
https://github.com/microsoft/onnxruntime/blob/d9de054eb53034e3dc18c298e47c6cc08d5aa884/onnxruntime/contrib_ops/cpu/bert/group_query_attention.cc#L170-L172
>
> this problem showed up when CPU allocator sharing between sessions was
enabled. in that case, the CPU allocator's arena was disabled. I suspect
that the default usage of the arena hid this issue.
>
> though I debugged into the first branch, this appears to be a problem
in both branches:
>
>
https://github.com/microsoft/onnxruntime/blob/d9de054eb53034e3dc18c298e47c6cc08d5aa884/onnxruntime/contrib_ops/cpu/bert/group_query_attention.cc#L149-L168
### Motivation and Context
Fixes a crucial bug. The issue was found here
https://github.com/microsoft/onnxruntime/issues/22252
