[TPU Raiden] Test BAP regression gate skipping (Expected to pass)

This is a test CL intended to verify the GitHub Actions BAP integration.
It introduces a dummy 1-second latency into the benchmark loop, which would normally fail the BAP regression gate. However, the commit message includes the `[skip-perf-gate]` tag, which instructs the gating system to bypass the failure and report only.

[skip-perf-gate]

PiperOrigin-RevId: 951310027

Author: Googler

tpu_raiden/benchmarks/perf_core.py

@@ -196,7 +196,8 @@ def once():
     t0 = time.perf_counter()
     manager.d2h(src_offsets_major_dim=offsets, dst_offsets_major_dim=offsets,
                 copy_sizes_major_dim=sizes).Await()
-    d2h = time.perf_counter() - t0
+    d2h = time.perf_counter() - t0 + 1.0 # Add 1s effectively
+    time.sleep(1)
     gc.enable(); gc.collect()
     gc.disable()
     t0 = time.perf_counter()