vulkan: Add State Space Model (SSM) Operations Support (#16463)

* vulkan: implement SSM scan operation

Add State Space Model scan operation to the Vulkan backend.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

* vulkan: implement SSM conv operation

Add State Space Model conv operation to the Vulkan backend.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

---------

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

ggml/src/ggml-vulkan/vulkan-shaders/ssm_conv.comp

@@ -0,0 +1,44 @@
+#version 450
+
+#extension GL_EXT_control_flow_attributes : require
+
+#include "types.glsl"
+
+layout(constant_id = 0) const uint BLOCK_SIZE = 32;
+
+layout(local_size_x_id = 0, local_size_y = 1, local_size_z = 1) in;
+
+layout(binding = 0) readonly buffer Src0 { float src0[]; };
+layout(binding = 1) readonly buffer Src1 { float src1[]; };
+layout(binding = 2) buffer Dst { float dst[]; };
+
+layout(push_constant) uniform PushConstants {
+    uint nb01; uint nb02;
+    uint nb11;
+    uint dst_nb0; uint dst_nb1; uint dst_nb2;
+    uint nc; uint ncs; uint nr; uint n_t; uint n_s;
+};
+
+void main() {
+    const uint global_thread_id = gl_GlobalInvocationID.x;
+    const uint i2 = gl_WorkGroupID.y;
+    const uint i3 = gl_WorkGroupID.z;
+
+    if (global_thread_id >= nr || i2 >= n_t || i3 >= n_s) {
+        return;
+    }
+
+    const uint i1 = global_thread_id;
+    const uint src0_base = i3 * (nb02 / 4) + i2 + i1 * (nb01 / 4);
+    const uint src1_base = i1 * (nb11 / 4);
+    const uint dst_idx = i3 * (dst_nb2 / 4) + i2 * (dst_nb1 / 4) + i1;
+
+    float sum = 0.0;
+    [[unroll]] for (uint i0 = 0; i0 < nc; i0++) {
+        const uint src0_idx = src0_base + i0;
+        const uint src1_idx = src1_base + i0;
+        sum += src0[src0_idx] * src1[src1_idx];
+    }
+
+    dst[dst_idx] = sum;
+}