tests/kernel-replace: tag with "reprovision"

This is a hack to get this test to run not in parallel with other
tests. The performance on our ppc64le builder has been abysmal and
this is one lever we can pull. We have bumped the timeout for the
test in the past. It's already at 20m. I say we just start running
this test serially.

tests/kola/rpm-ostree/kernel-replace

@@ -9,7 +9,11 @@
 ##   # RHCOS. See: https://github.com/containers/skopeo/issues/1846
 ##   distros: fcos
 ##   # Needs internet access as we fetch files from koji
-##   tags: "needs-internet platform-independent"
+##   # We add the "reprovision" tag here even though we aren't
+##   # reprovisioning as a hack so that in our pipeline the test
+##   # will execute with no other tests. We were seeing a lot of
+##   # timeouts on ppc64le.
+##   tags: "needs-internet platform-independent reprovision"
 ##   description: Verify that build of a container image with a new kernel
 ##     and reboot into it succeeds.