rename and refactor the GHA: llvmdev win-64 conda builder

As title

.github/workflows/llvmdev_win-64_conda_builder.yml

@@ -0,0 +1,40 @@
+name: llvmdev_win-64_conda_builder
+
+on:
+  workflow_dispatch:
+
+jobs:
+
+  windows:
+    name: Windows
+    runs-on: windows-2019
+    defaults:
+      run:
+        shell: bash -el {0}
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v4
+
+      - name: Setup Miniconda
+        uses: conda-incubator/setup-miniconda@v3
+        with:
+          auto-update-conda: true
+          auto-activate-base: true
+          activate-environment: ""
+
+      - name: Install conda-build
+        run: |
+          conda install conda-build
+
+      - name: Build llvmdev conda package
+        run: |
+          CONDA_BUILD_COMMDAND="conda build ./conda-recipes/llvmdev_manylinux"
+          $CONDA_BUILD_COMMDAND
+          echo "CONDA_PKG=$(CONDA_BUILD_COMMDAND --output)" >> $GITHUB_ENV
+
+      - name: Upload llvmdev conda package
+        uses: actions/upload-artifact@v4
+        with:
+          name: llvmdev
+          path: ${{ env.CONDA_PKG }}