ci: Download host-specific artifacts when building distribution bundle

With the GitHub `download-artifact` action v4, it is now possible to
specify a glob pattern for filtering the artifacts to be downloaded.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

.github/workflows/ci.yml

@@ -1136,12 +1136,22 @@ jobs:
         path: repository
         persist-credentials: false
 
-    - name: Download artifacts
+    - name: Download CMake artifacts
       uses: actions/download-artifact@v4
       with:
-        # NOTE: This downloads all build artifacts, including the toolchains and host tools for
-        #       the irrelevant hosts, because the download-artifact action does not support
-        #       specifying wildcards in the artifact name.
+        pattern: cmake_${{ matrix.host.name }}
+        path: artifacts
+
+    - name: Download host tools artifacts
+      uses: actions/download-artifact@v4
+      with:
+        pattern: hosttools_${{ matrix.host.name }}
+        path: artifacts
+
+    - name: Download GNU toolchain artifacts
+      uses: actions/download-artifact@v4
+      with:
+        pattern: toolchain_gnu_${{ matrix.host.name }}_*
         path: artifacts
 
     - name: Create distribution bundle