Add back linux pull jobs (#9239)

Looks like I lied when I said
#9227 was a no-op

Adding back pull jobs for linux x86

Author: mergennachin

.github/workflows/pull.yml

@@ -38,8 +38,8 @@ jobs:
         # Build and test ExecuTorch with the add model on portable backend.
         PYTHON_EXECUTABLE=python bash .ci/scripts/test_model.sh "add" "${BUILD_TOOL}" "portable"
 
-  test-models-linux:
-    name: test-models-linux
+  test-models-linux-basic:
+    name: test-models-linux-basic
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
     permissions:
       id-token: write
@@ -70,6 +70,59 @@ jobs:
         # Build and test ExecuTorch
         PYTHON_EXECUTABLE=python bash .ci/scripts/test_model.sh "${MODEL_NAME}" "${BUILD_TOOL}" "${BACKEND}"
 
+  test-models-linux:
+    name: test-models-linux
+    uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main
+    permissions:
+      id-token: write
+      contents: read
+    strategy:
+      matrix:
+        model: [linear, add, add_mul, ic3, mv2, resnet18, resnet50, mobilebert, emformer_transcribe]
+        backend: [portable, xnnpack-quantization-delegation]
+        runner: [linux.2xlarge]
+        include:
+          - model: ic4
+            backend: portable
+            runner: linux.4xlarge.memory
+          - model: ic4
+            backend: xnnpack-quantization-delegation
+            runner: linux.4xlarge.memory
+          - model: emformer_join
+            backend: portable
+            runner: linux.4xlarge.memory
+          - model: emformer_join
+            backend: xnnpack-quantization-delegation
+            runner: linux.4xlarge.memory
+          - model: phi-4-mini
+            backend: portable
+            runner: linux.4xlarge.memory
+          - model: llama3_2_vision_encoder
+            backend: portable
+            runner: linux.4xlarge.memory
+          - model: w2l
+            backend: portable
+            runner: linux.4xlarge.memory
+      fail-fast: false
+    with:
+      runner: ${{ matrix.runner }}
+      docker-image: executorch-ubuntu-22.04-clang12
+      submodules: 'true'
+      ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
+      timeout: 90
+      script: |
+        # The generic Linux job chooses to use base env, not the one setup by the image
+        CONDA_ENV=$(conda env list --json | jq -r ".envs | .[-1]")
+        conda activate "${CONDA_ENV}"
+
+        MODEL_NAME=${{ matrix.model }}
+        BUILD_TOOL=cmake
+        BACKEND=${{ matrix.backend }}
+
+        PYTHON_EXECUTABLE=python bash .ci/scripts/setup-linux.sh --build-tool "${BUILD_TOOL}"
+        # Build and test ExecuTorch
+        PYTHON_EXECUTABLE=python bash .ci/scripts/test_model.sh "${MODEL_NAME}" "${BUILD_TOOL}" "${BACKEND}"
+
   test-llama-runner-linux:
     name: test-llama-runner-linux
     uses: pytorch/test-infra/.github/workflows/linux_job_v2.yml@main