[release-5.0] OCPBUGS-126612: Disable el98 low-latency presubmit (tuned 2.28.0 regression)

test/scenarios/presubmits/el98-src@low-latency.sh → test/scenarios/presubmits/el98-src@low-latency.sh.disabled

@@ -1,5 +1,21 @@
 #!/bin/bash
 
+# DISABLED (OCPBUGS-123681 / RHEL-261119): renamed with a .disabled suffix so
+# the test harness (which only picks up *.sh scenarios) skips it entirely.
+#
+# tuned 2.28.0-1.el9fdp regressed the [bootloader] plugin so that, on
+# traditionally-deployed rpm-ostree hosts, the microshift-baseline kernel
+# arguments are no longer persisted to the BLS boot entry (tuned-adm returns 0
+# but /proc/cmdline is unchanged after reboot). This is a real, shipping defect:
+# the low-latency profile is broken in the field for anyone on tuned 2.28.0, so
+# there is nothing valid to gate PRs on until it is fixed. The composer image
+# cannot be pinned to an older tuned (the edge-commit image-type package set
+# requests tuned unversioned, so a blueprint version pin only produces a
+# depsolve "conflicting requests" error).
+#
+# Re-enable by renaming this file back to el98-src@low-latency.sh once the fixed
+# tuned build lands in el9fdp.
+
 export SKIP_GREENBOOT=true
 export TEST_RANDOMIZATION=none