ci: run livemedia-creator directly in runner image (drop mock)

mock --init fails on repo GPG signature verification in the runner
container. The container is already fedora:44 with anaconda/lorax
installed, so the mock chroot adds nothing but a failing GPG wall.
Run dnf-installed lorax-lmc-novirt/pykickstart/livecd-tools and
livemedia-creator directly in the job container; artifacts now live
under build/ in the workspace.

.gitea/workflows/build-iso.yaml

@@ -48,47 +48,30 @@ jobs:
       - name: Install Python deps
         run: pip install -r cook/requirements.txt
 
-      - name: Initialize mock
-        run: |
-          mock -r fedora-${{ env.FEDORA_VERSION }}-x86_64 --init
-
-      - name: Install required packages
-        run: |
-          mock -r fedora-${{ env.FEDORA_VERSION }}-x86_64 --install lorax-lmc-novirt vim-minimal pykickstart livecd-tools
+      - name: Install build tools
+        run: dnf -y install lorax-lmc-novirt pykickstart livecd-tools
 
       - name: Generate dishes
         run: |
           cd cook
           make all
 
-      - name: Copy configuration file to mock
-        run: |
-          mock -r fedora-${{ env.FEDORA_VERSION }}-x86_64 --copyin cook/dishes/${{ env.KICKSTART_FILE }}.cfg /builddir
-
       - name: Build ISO with livemedia-creator
         run: |
-          mock -r fedora-${{ env.FEDORA_VERSION }}-x86_64 --shell --enable-network --isolation=simple << 'EOF'
-          cd /builddir
-          livemedia-creator --ks ${{ env.KICKSTART_FILE }}.cfg --no-virt --resultdir /var/lmc --project phyllomeos --make-iso --volid phyllomeos --iso-only --iso-name ${{ env.KICKSTART_FILE }}-${{ env.FEDORA_VERSION }}.iso --releasever ${{ env.FEDORA_VERSION }} --macboot
-          EOF
+          livemedia-creator --ks cook/dishes/${{ env.KICKSTART_FILE }}.cfg --no-virt --resultdir build --project phyllomeos --make-iso --volid phyllomeos --iso-only --iso-name ${{ env.KICKSTART_FILE }}-${{ env.FEDORA_VERSION }}.iso --releasever ${{ env.FEDORA_VERSION }} --macboot
 
       - name: Upload ISO as artifact
         if: github.ref == 'refs/heads/main'
         uses: actions/upload-artifact@v3
         with:
           name: ${{ env.KICKSTART_FILE }}-${{ env.FEDORA_VERSION }}.iso
-          path: /var/lib/mock/fedora-${{ env.FEDORA_VERSION }}-x86_64/root/var/lmc/${{ env.KICKSTART_FILE }}-${{ env.FEDORA_VERSION }}.iso
+          path: build/${{ env.KICKSTART_FILE }}-${{ env.FEDORA_VERSION }}.iso
           if-no-files-found: error
 
       - name: Publish ISO as release
         if: startsWith(github.ref, 'refs/tags/')
         uses: https://git.phyllo.me/devops/action-gh-release@v2
         with:
-          files: /var/lib/mock/fedora-${{ env.FEDORA_VERSION }}-x86_64/root/var/lmc/${{ env.KICKSTART_FILE }}-${{ env.FEDORA_VERSION }}.iso
+          files: build/${{ env.KICKSTART_FILE }}-${{ env.FEDORA_VERSION }}.iso
           draft: false
-          prerelease: false
-
-      - name: Cleanup mock environment
-        if: always()
-        run: |
-          mock -r fedora-${{ env.FEDORA_VERSION }}-x86_64 --clean
+          prerelease: false