ci/vagrant: install vanilla kernel for Fedora Rawhide test

We need at least 6.16 to test MADV_GUARD_INSTALL support, but
our current Fedora Rawhide test uses only Rawhide's user space,
while using Fedora 42 kernel. Let's start using a vanilla kernel.

Suggested-by: Adrian Reber <[email protected]>
Signed-off-by: Alexander Mikhalitsyn <[email protected]>

Author: mihalicyn

scripts/ci/vagrant.sh

@@ -66,6 +66,10 @@ fedora-no-vdso() {
 }
 
 fedora-rawhide() {
+	# Upgrade the kernel to the latest vanilla one
+	ssh default sudo dnf -y copr enable @kernel-vanilla/stable
+	ssh default sudo dnf upgrade -y
+
 	# The 6.2 kernel of Fedora 38 in combination with rawhide userspace breaks
 	# zdtm/static/socket-tcp-nfconntrack. To activate the new kernel previously
 	# installed this reboots the VM.