Fix Phi-2 with `tp>1` (#2003)

# What does this PR do?

We were using the wrong parallelism in the up-projection.

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server/text_generation_server/models/custom_modeling/flash_phi_modeling.py

@@ -238,7 +238,7 @@ class PhiMLP(nn.Module):
         )
 
         # llama weights are up_proj and down_proj and bias=False
-        self.up_proj = TensorParallelRowLinear.load(
+        self.up_proj = TensorParallelColumnLinear.load(
             config,
             prefix=f"{prefix}.fc1",
             weights=weights,