Only set default filesystem to XFS in CentOS

Fedora default filesystem is a messier situation.  This makes
it easier to inherit Fedora builds.

Signed-off-by: Colin Walters <walters@verbum.org>

centos-stream-10.yaml

@@ -2,6 +2,5 @@ releasever: stream10
 variables:
   distro: "stream10"
 
-repos:
-  - baseos
-  - appstream
+include:
+  - centos-stream-common.yaml

centos-stream-9.yaml

@@ -2,6 +2,5 @@ releasever: stream9
 variables:
   distro: "stream9"
 
-repos:
-  - baseos
-  - appstream
+include:
+  - centos-stream-common.yaml

centos-stream-common.yaml

@@ -0,0 +1,14 @@
+repos:
+  - baseos
+  - appstream
+
+# Configuration for bootc
+postprocess:
+  # XFS is our default filesystem
+  - |
+    #!/usr/bin/env bash
+    mkdir -p /usr/lib/bootc/install/
+    cat > /usr/lib/bootc/install/20-rhel.toml << EOF
+    [install]
+    root-fs-type = "xfs"
+    EOF

tier-0/bootc-config.yaml

@@ -1,10 +0,0 @@
-# Configuration for bootc
-postprocess:
-  # XFS is our default filesystem
-  - |
-    #!/usr/bin/env bash
-    mkdir -p /usr/lib/bootc/install/
-    cat > /usr/lib/bootc/install/20-rhel.toml << EOF
-    [install]
-    root-fs-type = "xfs"
-    EOF

tier-0/manifest.yaml

@@ -51,7 +51,6 @@ remove-from-packages:
 include:
   - bootc.yaml
   - ostree.yaml
-  - bootc-config.yaml
   - initramfs.yaml
   - autoupdates.yaml
   - basic-fixes.yaml