Fix pipeline by adding mandatory value

Signed-off-by: Dimitris Karakasilis <dimitris@karakasilis.me>

.github/workflows/image-pr.yaml

@@ -43,6 +43,7 @@ jobs:
     uses: ./.github/workflows/reusable-install-test.yaml
     with:
       flavor: alpine
+      flavor_release: "3.18"
     needs:
       - core-alpine
 
@@ -66,6 +67,7 @@ jobs:
     uses: ./.github/workflows/reusable-qemu-acceptance-test.yaml
     with:
       flavor: alpine
+      flavor_release: "3.18"
     needs:
       - core-alpine
 
@@ -89,6 +91,7 @@ jobs:
     uses: ./.github/workflows/reusable-qemu-reset-test.yaml
     with:
       flavor: alpine
+      flavor_release: "3.18"
     needs:
       - core-alpine
 
@@ -108,6 +111,11 @@ jobs:
     uses: ./.github/workflows/reusable-qemu-netboot-test.yaml
     with:
       flavor: alpine
+      flavor_release: "3.18"
+      family: alpine
+      base_image: alpine:3.18
+      model: generic
+      variant: core
     needs:
       - core-alpine
 
@@ -123,6 +131,7 @@ jobs:
     uses: ./.github/workflows/reusable-upgrade-with-cli-test.yaml
     with:
       flavor: alpine
+      flavor_release: "3.18"
     needs:
       - core-alpine
 
@@ -139,6 +148,7 @@ jobs:
   #  uses: ./.github/workflows/reusable-upgrade-latest-test.yaml
   #  with:
   #    flavor: alpine
+  #    flavor_release: "3.18"
   #  needs:
   #    - core-alpine
 
@@ -164,6 +174,7 @@ jobs:
     uses: ./.github/workflows/reusable-encryption-test.yaml
     with:
       flavor: alpine
+      flavor_release: "3.18"
       label: ${{ matrix.label }}
     needs:
       - core-alpine