github-ci: add var to disable rpm builds

There will be changes in our development branch that the RPMs need to
adapt to, but that can't be done until the changes have been merged to
master, then the RPM can catchup.

This gives us a single variable to turn off RPM building.

.github/workflows/builds.yml

@@ -400,6 +400,8 @@ jobs:
         container:
           - almalinux:9
           - fedora:40
+    env:
+      skip: false
     steps:
       - name: Cache cargo registry
         uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57
@@ -414,7 +416,13 @@ jobs:
           key: ${{ github.job }}-dnf
       - run: echo "keepcache=1" >> /etc/dnf/dnf.conf
 
+      - name: Download Suricata distribution archive
+        uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16
+        with:
+          name: dist
+
       - name: Install packages
+        if: ${{ env.skip != 'true' }}
         run: |
           if test -e /etc/almalinux-release; then
               dnf -y install \
@@ -435,31 +443,26 @@ jobs:
               echo "ERROR: Unsupported distribution for RPM building"
               exit 1
            fi
-      - name: Download Suricata distribution archive
-        uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16
-        with:
-          name: dist
-      - run: git clone https://github.com/jasonish/suricata-rpms
-      - run: make update-release update-sources
-        working-directory: suricata-rpms/devel
-      - run: dnf -y install $(rpmspec -q --buildrequires ./suricata.spec)
-        working-directory: suricata-rpms/devel
-      - run: mv suricata-*.tar.gz suricata-rpms/devel
-      - run: make srpm
-        working-directory: suricata-rpms/devel
-      - run: make local
-        working-directory: suricata-rpms/devel
+      - if: ${{ env.skip != 'true' }}
+        run: |
+          git clone https://github.com/jasonish/suricata-rpms
+          cd suricata-rpms/devel
+          make update-release update-sources
+          dnf -y install $(rpmspec -q --buildrequires ./suricata.spec)
+          mv ../../suricata-*.tar.gz .
+          make srpm
+          make local
 
       # We need a step for each RPM upload as we can't use the
       # container name directly in an artifact, as artifacts can't
       # have ':' in the name.
-      - if: matrix.container == 'fedora:40'
+      - if: matrix.container == 'fedora:40' && ${{ env.skip != 'true' }}
         uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08
         name: Uploading RPMs
         with:
           name: rpms-fedora-40
           path: suricata-rpms/devel/rpms
-      - if: matrix.container == 'almalinux:9'
+      - if: matrix.container == 'almalinux:9' && ${{ env.skip != 'true' }}
         uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08
         name: Uploading RPMs
         with: