Arm backend: Add VGF minimal example to out-of-box testing (pytorch#13861)

### Summary
Adding the VGF minimal example to automated test flow
- Minor fixes to VGF minimal example

Author: SaoirseARM

examples/arm/vgf_minimal_example.ipynb

@@ -23,13 +23,11 @@
     "\n",
     "Before you begin:\n",
     "1. (In a clean virtual environment with a compatible Python version) Install executorch using `./install_executorch.sh`\n",
-    "2. Install MLSDK and Tosa using `examples/arm/setup.sh --disable-ethos-u-deps --enable-mlsdk-deps (For further guidance, refer to https://docs.pytorch.org/executorch/main/tutorial-arm.html)\n",
+    "2. Install MLSDK and Tosa using `examples/arm/setup.sh --disable-ethos-u-deps --enable-mlsdk-deps` (For further guidance, refer to https://docs.pytorch.org/executorch/main/tutorial-arm.html)\n",
     "3. Export vulkan environment variables and add MLSDK components to PATH and LD_LIBRARY_PATH using `examples/arm/ethos-u-scratch/setup_path.sh`\n",
     "\n",
     "With all commands executed from the base `executorch` folder.\n",
     "\n",
-    "\n",
-    "\n",
     "*Some scripts in this notebook produce long output logs: Configuring the 'Customizing Notebook Layout' settings to enable 'Output:scrolling' and setting 'Output:Text Line Limit' makes this more manageable*"
    ]
   },
@@ -165,6 +163,17 @@
     "All of this happens behind the scenes in `to_edge_transform_and_lower`. Printing the graph module shows that what is left in the graph is two quantization nodes for `x` and `y` going into an `executorch_call_delegate` node, followed by a dequantization node."
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%%bash\n",
+    "# Ensure the vulkan environment variables and MLSDK components are available on $PATH\n",
+    "source ethos-u-scratch/setup_path.sh"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -220,10 +229,21 @@
     "\n",
     "\n",
     "After the AOT compilation flow is done, we need to build the executor_runner target. For this example the generic version will be used.\n",
-    "To do this, please ensure the following commands are executed before moving onto the next step.\n",
+    "To do this, please ensure the following commands are executed before moving onto the next step."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%%bash\n",
+    "# Ensure the vulkan environment variables and MLSDK components are available on $PATH\n",
+    "source ethos-u-scratch/setup_path.sh\n",
     "\n",
-    "Clean and configure the CMake build system. Compiled programs will appear in the executorch/cmake-out directory we create here.\n",
-    "```\n",
+    "# Compiled programs will appear in the executorch/cmake-out directory we create here.\n",
+    "# Build example executor runner application to examples/arm/vgf_minimal_example\n",
     "cmake \\\n",
     "  -DCMAKE_INSTALL_PREFIX=cmake-out \\\n",
     "  -DCMAKE_BUILD_TYPE=Debug \\\n",
@@ -237,11 +257,9 @@
     "  -DEXECUTORCH_BUILD_VGF=ON \\\n",
     "  -DEXECUTORCH_ENABLE_LOGGING=ON \\\n",
     "  -DPYTHON_EXECUTABLE=python \\\n",
-    "  -Bcmake-out .\n",
-    "```\n",
+    "  -B../../cmake-out-vkml ../..\n",
     "\n",
-    "Build the executor_runner target\n",
-    "`cmake --build cmake-out --target executor_runner`\n"
+    "cmake --build ../../cmake-out-vkml --target executor_runner"
    ]
   },
   {