[Triton][Config] Add muls_add triton kernel and refactor AscendCompilationConfig (#5518)

### What this PR does / why we need it?
Add muls_add triton kernel with related fusion pass. What's more, this
PR refactors `AscendCompilationConfig` and delete `NpugraphExConfig`.

### Does this PR introduce _any_ user-facing change?
None

### How was this patch tested?
CI passed with new added test.


- vLLM version: v0.13.0
- vLLM main:
45c1ca1ca1

---------

Signed-off-by: whx-sjtu <2952154980@qq.com>

vllm_ascend/ops/triton/muls_add.py

@@ -0,0 +1,57 @@
+import torch
+from vllm.triton_utils import tl, triton
+
+from vllm_ascend.ops.triton.triton_utils import get_vectorcore_num
+
+
+@triton.jit
+def muls_add_kernel(
+    x_ptr,  # *Pointer* to first input vector.
+    y_ptr,  # *Pointer* to second input vector.
+    output_ptr,  # *Pointer* to output vector.
+    scale,  # Scale factor.
+    n_elements,  # Size of the vector.
+    n_blocks,  # Total number of blocks.
+    BLOCK_SIZE: tl.constexpr,  # Number of elements each program should process.
+):
+    pid = tl.program_id(axis=0)
+    num_programs = tl.num_programs(axis=0)
+    for block_id in range(pid, n_blocks, num_programs):
+        block_start = block_id * BLOCK_SIZE
+        offsets = block_start + tl.arange(0, BLOCK_SIZE)
+        mask = offsets < n_elements
+        x = tl.load(x_ptr + offsets, mask=mask)
+        y = tl.load(y_ptr + offsets, mask=mask)
+        output = x * scale + y
+        tl.store(output_ptr + offsets, output, mask=mask)
+
+
+def muls_add_triton(x: torch.Tensor, y: torch.Tensor, scale: float) -> torch.Tensor:
+    assert x.shape == y.shape, "Input tensors must have the same shape."
+    hidden_size = x.shape[-1]
+
+    n_elements = x.numel()
+    output = torch.empty_like(x)
+
+    # Determine the number of vector cores available
+    num_cores = get_vectorcore_num()
+
+    # Define block size
+    BLOCK_SIZE = max(hidden_size // 2, 1024)
+
+    # Calculate the number of programs to launch
+    num_blocks = (n_elements + BLOCK_SIZE - 1) // BLOCK_SIZE
+    num_programs = min(num_blocks, num_cores)
+
+    # Launch the Triton kernel
+    muls_add_kernel[(num_programs,)](
+        x,
+        y,
+        output,
+        scale,
+        n_elements,
+        num_blocks,
+        BLOCK_SIZE=BLOCK_SIZE,
+    )
+
+    return output