manifests: move vars to a separate file

This change is applied only to manifests based on fedora-build-v2 for now.

test/data/manifests/fedora-ostree-commit.mpp.yaml

@@ -1,11 +1,7 @@
-mpp-vars:
-  arch: x86_64
-  release: 36
-  releasever: f$release
-  snapshot: '20220617'
-  updates: '20220801'
 version: '2'
 pipelines:
+  - mpp-import-pipelines:
+      path: fedora-vars.ipp.yaml
   - mpp-import-pipeline:
       path: fedora-build-v2.ipp.yaml
       id: build

test/data/manifests/fedora-ostree-image.mpp.yaml

@@ -1,9 +1,3 @@
-mpp-vars:
-  arch: x86_64
-  release: 36
-  releasever: f$release
-  snapshot: '20220617'
-  updates: '20220801'
 version: '2'
 mpp-define-image:
   id: image
@@ -29,6 +23,8 @@ mpp-define-image:
         type: 0FC63DAF-8483-4772-8E79-3D69D8477DE4
         uuid: CA7D7CCB-63ED-4C53-861C-1742536059CC
 pipelines:
+  - mpp-import-pipelines:
+      path: fedora-vars.ipp.yaml
   - mpp-import-pipeline:
       path: fedora-build-v2.ipp.yaml
       id: build

test/data/manifests/fedora-ostree-native-container.mpp.yaml

@@ -1,11 +1,7 @@
-mpp-vars:
-  arch: x86_64
-  release: 36
-  releasever: f$release
-  snapshot: '20220617'
-  updates: '20220715'
 version: '2'
 pipelines:
+  - mpp-import-pipelines:
+      path: fedora-vars.ipp.yaml
   - mpp-import-pipeline:
       path: fedora-build-v2.ipp.yaml
       id: build

test/data/manifests/fedora-uki.mpp.yaml

@@ -1,11 +1,7 @@
 version: '2'
-mpp-vars:
-  arch: x86_64
-  release: 36
-  releasever: f$release
-  snapshot: '20220617'
-  updates: '20220801'
 pipelines:
+  - mpp-import-pipelines:
+      path: fedora-vars.ipp.yaml
   - mpp-import-pipeline:
       path: fedora-build-v2.ipp.yaml
       id: build

test/data/manifests/fedora-vars.ipp.yaml

@@ -0,0 +1,8 @@
+version: '2'
+
+mpp-vars:
+  arch: x86_64
+  release: 36
+  releasever: f$release
+  snapshot: '20220617'
+  updates: '20220801'