Fix(build): Use standard CMake pipelines and clean up dev package

- Replaced custom build steps with Melange standard CMake pipelines (configure, build, install).
- Set BUILD_TESTING=OFF as want_check was causing issues.
- Removed manual handling of aws-c-mqtt dev folder, as it is now managed upstream (see: awslabs/aws-c-mqtt#379).

Signed-off-by: Debasish Biswas <debasishbsws.dev@gmail.com>

Author: debasishbsws

aws-c-mqtt.yaml

@@ -29,33 +29,25 @@ pipeline:
       repository: https://github.com/awslabs/aws-c-mqtt
       tag: v${{package.version}}
 
-  - runs: |
-      if [ "$CBUILD" != "$CHOST" ]; then
-        CMAKE_CROSSOPTS="-DCMAKE_SYSTEM_NAME=Linux -DCMAKE_HOST_SYSTEM_NAME=Linux"
-      fi
-      CFLAGS="$CFLAGS -flto=auto" \
-      CXXFLAGS="$CXXFLAGS -flto=auto" \
-      cmake -B build -G Ninja \
-        -DCMAKE_INSTALL_PREFIX=/usr \
-        -DCMAKE_INSTALL_LIBDIR=/usr/lib \
+  - uses: cmake/configure
+    with:
+      opts: |
         -DBUILD_SHARED_LIBS=True \
         -DCMAKE_BUILD_TYPE=None \
-        -DBUILD_TESTING="$(want_check && echo ON || echo OFF)" \
-        $CMAKE_CROSSOPTS
-      cmake --build build
+        -DBUILD_TESTING=OFF \
+        -DCMAKE_SYSTEM_NAME=Linux \
+        -DCMAKE_HOST_SYSTEM_NAME=Linux
+
+  - uses: cmake/build
 
-  - runs: |
-      DESTDIR="${{targets.destdir}}" cmake --install build
+  - uses: cmake/install
 
   - uses: strip
 
 subpackages:
   - name: aws-c-mqtt-dev
     pipeline:
       - uses: split/dev
-      - runs: |
-          mkdir -p "${{targets.subpkgdir}}"/usr/lib
-          mv "${{targets.destdir}}"/usr/lib/aws-c-mqtt "${{targets.subpkgdir}}"/usr/lib/
     dependencies:
       runtime:
         - aws-c-mqtt