disable docker images on Windows, install MSYS2

Author: ianbotsf

.github/workflows/continuous-integration.yml

@@ -186,11 +186,14 @@ jobs:
         run: |
           ./aws-crt-kotlin/docker-images/build-images.sh linux-x64 linux-arm64
 
-      - name: Configure Windows CRT Docker Images
-        shell: bash
+      - name: Set up MSYS2
         if: ${{ matrix.os == 'windows-latest' }}
-        run: |
-          ./aws-crt-kotlin/docker-images/build-images.sh mingw-x64
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: MINGW64
+          install: >-
+            mingw-w64-x86_64-cmake
+            mingw-w64-x86_64-gcc
 
       - name: Sanity checks
         shell: bash
@@ -213,12 +216,23 @@ jobs:
           done
 
       - name: Test
+        if: ${{ matrix.os != 'windows-latest' }}
         working-directory: ./smithy-kotlin
         shell: bash
         run: |
           # FIXME K2. Re-enable warnings as errors after this warning is removed: https://youtrack.jetbrains.com/issue/KT-68532
           # echo "kotlinWarningsAsErrors=true" >> $GITHUB_WORKSPACE/local.properties
           ./gradlew build
+
+      - name: Test on Windows
+        if: ${{ matrix.os == 'windows-latest' }}
+        working-directory: ./smithy-kotlin
+        shell: msys2 {0}
+        run: |
+          # FIXME K2. Re-enable warnings as errors after this warning is removed: https://youtrack.jetbrains.com/issue/KT-68532
+          # echo "kotlinWarningsAsErrors=true" >> $GITHUB_WORKSPACE/local.properties
+          ./gradlew build -Paws.crt.disableContainerTargets=mingw_x64
+
       - name: Save Test Reports
         if: failure()
         uses: actions/upload-artifact@v4