overrides: pin kernel-6.3.12-200 on ppc64le only

Temporarily add `manifest-lock.overrides.ppc64le.yaml` to pin the kernel
on `ppc64le` only for the next FCOS release cycle while we wait for a
fix on the issue: coreos/fedora-coreos-tracker#1489

See: coreos/fedora-coreos-tracker#1489 (comment)

manifest-lock.overrides.ppc64le.yaml

@@ -0,0 +1,31 @@
+# This lockfile should be used to pin to a package version (`type: pin`) or to
+# fast-track packages ahead of Bodhi (`type: fast-track`). Fast-tracked
+# packages will automatically be removed once they are in the stable repos.
+#
+# IMPORTANT: YAML comments *will not* be preserved. All `pin` overrides *must*
+# include a URL in the `metadata.reason` key. Overrides of type `fast-track`
+# *should* include a Bodhi update URL in the `metadata.bodhi` key and a URL
+# in the `metadata.reason` key, though it's acceptable to omit a `reason`
+# for FCOS-specific packages (ignition, afterburn, etc.).
+
+packages:
+  kernel:
+    evra: 6.3.12-200.fc38.ppc64le
+    metadata:
+      reason: https://github.com/coreos/fedora-coreos-tracker/issues/1489
+      type: pin
+  kernel-core:
+    evra: 6.3.12-200.fc38.ppc64le
+    metadata:
+      reason: https://github.com/coreos/fedora-coreos-tracker/issues/1489
+      type: pin
+  kernel-modules:
+    evra: 6.3.12-200.fc38.ppc64le
+    metadata:
+      reason: https://github.com/coreos/fedora-coreos-tracker/issues/1489
+      type: pin
+  kernel-modules-core:
+    evra: 6.3.12-200.fc38.ppc64le
+    metadata:
+      reason: https://github.com/coreos/fedora-coreos-tracker/issues/1489
+      type: pin