#18332: Update BN Kernel (#18406)

### Ticket
#18332

### What's changed
Pop eps from Batch Norm kernel

### Checklist
- [x] [All post-commit
tests](https://github.com/tenstorrent/tt-metal/actions/runs/13567963660)
- [x] [Blackhole Post
commit](https://github.com/tenstorrent/tt-metal/actions/runs/13567982312)
- [x] Full [new
models](https://github.com/tenstorrent/tt-metal/actions/workflows/full-new-models-suite.yaml)
- [Link to
test](https://github.com/tenstorrent/tt-metal/actions/runs/13567984404)
- [x] [(Single-card) Demo
tests](https://github.com/tenstorrent/tt-metal/actions/runs/13567986357)
- [x] [(Single-card) Device perf
regressions](https://github.com/tenstorrent/tt-metal/actions/runs/13567987783)
- [x] [Single-card Model perf
tests](https://github.com/tenstorrent/tt-metal/actions/runs/13567989090)

ttnn/cpp/ttnn/operations/normalization/batch_norm/device/kernels/compute/batch_norm_kernel.cpp

@@ -163,7 +163,8 @@ void MAIN {
     uint32_t complete_iterations = (num_tiles + tile_start) / tile_freq;
     uint32_t remaining_iterations = (num_tiles + tile_start) % tile_freq;
 
-    cb_wait_front(cb_eps, 1);
+    constexpr uint32_t onetile = 1;
+    cb_wait_front(cb_eps, onetile);
 
     for (uint32_t i = 0; i < complete_iterations; ++i, tile_start = 0) {
         batchnorm_bcast_tiles(
@@ -199,5 +200,7 @@ void MAIN {
             weight_has_value,
             bias_has_value);
     }
+
+    cb_pop_front(cb_eps, onetile);
 }
 }  // namespace NAMESPACE

ttnn/cpp/ttnn/operations/normalization/batch_norm/device/kernels/compute/batch_norm_sfpu_kernel.cpp

@@ -238,5 +238,7 @@ void MAIN {
             weight_has_value,
             bias_has_value);
     }
+
+    cb_pop_front(cb_eps, onetile);
 }
 }  // namespace NAMESPACE