hexagon: support for op-trace (fine-grain tracing of HVX/HMX/DMA events) (#24592)

* hex-optrace: add support for optrace and instrument matmul and flash-atten code

* hex-trace: improve trace event and prefetto generator

* hex-trace: add new script dedicated to handling traces, specifically perfetto traces

* hex-trace: add --head/--tail options to profile and trace tools

* hex-trace: fix whitespaces

* hex-trace: fix flake8 warnings

* hex-trace: fix flake8 warnings

* hmx-fa: restore q_tiles clearing

* hex-profile: remove circular dep in includes

* hex-trace: simplify trace sizing check

* hex-profile: sort events in the summary by name

ggml/src/ggml-hexagon/htp/flash-attn-ops.c

@@ -339,6 +339,9 @@ static void flash_attn_ext_f16_thread(unsigned int nth, unsigned int ith, void *
 
     if (ir0 >= ir1) return;
 
+    struct htp_thread_trace * tr = octx->ctx ? &octx->ctx->trace[ith] : NULL;
+    htp_trace_event_start(tr, HTP_TRACE_EVT_HVX_COMP, ir0);
+
     dma_queue * dma = octx->ctx->dma[ith];
 
     const uint32_t DK = nek0;
@@ -615,6 +618,7 @@ static void flash_attn_ext_f16_thread(unsigned int nth, unsigned int ith, void *
             hvx_copy_f16_f32_ua(dst_ptr, (uint8_t *) VKQ32, DV);
         }
     }
+    htp_trace_event_stop(tr, HTP_TRACE_EVT_HVX_COMP, ir0);
 }
 
 int op_flash_attn_ext(struct htp_ops_context * octx) {