Try to use newer CMake from base Windows-2019 image on Windows R buil…

…d instead of installing via MSYS2

.github/workflows/r.yml

@@ -282,12 +282,6 @@ jobs:
           restore-keys: |
             r-${{ matrix.config.rtools }}-ccache-mingw-${{ matrix.config.arch }}-${{ hashFiles('cpp/src/**/*.cc','cpp/src/**/*.h)') }}-
             r-${{ matrix.config.rtools }}-ccache-mingw-${{ matrix.config.arch }}-
-      - name: Install CMake via MSYS2
-        uses: msys2/setup-msys2@v2
-        with:
-          msystem: UCRT64
-          update: true
-          install: mingw-w64-ucrt-x86_64-cmake
       - uses: r-lib/actions/setup-r@v2
         with:
           # Note: RTools must be 40 here because RTools40 + ucrt is how we build the Arrow C++

ci/scripts/PKGBUILD

@@ -83,10 +83,8 @@ build() {
   # MSYS2_ARG_CONV_EXCL is needed to prevent autoconverting CMAKE_INSTALL_PREFIX
   # to Windows paths. See https://www.msys2.org/docs/filesystem-paths/#process-arguments
 
-  # We install CMake via the msys2 GitHub action. We have to use the installed
-  # CMake to build Arrow which is in the Program Files directory.
   MSYS2_ARG_CONV_EXCL="-DCMAKE_INSTALL_PREFIX=" \
-    "${PROGRAMFILES}\CMake\bin\cmake.exe" \
+    cmake \
     ${ARROW_CPP_DIR} \
     -G "MSYS Makefiles" \
     -DARROW_ACERO=ON \