ci: replace custom cmake script with action (microsoft#2780)

## Summary:

Helps (but doesn't fix) microsoft#2789 

Replace the custom bash script to pin cmake with an action that upstream
React Native is using.

Author: Saadnajmi

.github/actions/microsoft-setup-toolchain/action.yml

@@ -22,31 +22,10 @@ inputs:
 runs:
   using: composite
   steps:
-    - name: Pin cmake version
-      if: ${{ inputs.platform == 'macos' || inputs.platform == 'ios' || inputs.platform == 'visionos' }}
-      run: |
-        brew uninstall cmake
-        # Copied from https://github.com/actions/runner-images/pull/12791
-        # Pin cmake to 3.31.6 due to a backward compatibility issue
-        # https://github.com/actions/runner-images/issues/11926
-        cmake_commit="b4e46db74e74a8c1650b38b1da222284ce1ec5ce"
-        tap_name="local/pinned"
-        
-        echo "Creating local tap (no git)..."
-        brew tap-new --no-git "$tap_name" >/dev/null
-        
-        cmake_formula_dir="$(brew --repo "$tap_name")/Formula"
-        mkdir -p "$cmake_formula_dir"
-        
-        cmake_rb_link="https://raw.githubusercontent.com/Homebrew/homebrew-core/$cmake_commit/Formula/c/cmake.rb"
-        cmake_rb_path="$cmake_formula_dir/cmake.rb"
-        
-        echo "Downloading cmake.rb from $cmake_rb_link"
-        curl -fsSL "$cmake_rb_link" -o "$cmake_rb_path"
-        
-        echo "Installing cmake 3.31.6 from custom tap..."
-        brew install "$tap_name/cmake"
-      shell: bash
+    - name: Install cmake
+      uses: jwlawson/actions-setup-cmake@v2
+      with:
+        cmake-version: '3.26.4'
     - name: Set up Ccache
       id: setup-ccache
       if: ${{ inputs.platform == 'ios' || inputs.platform == 'macos' || inputs.platform == 'visionos' }}