ci/jenkins: Drop runAsUser: 0

This provokes a virtiofs bug:
https://gitlab.com/virtio-fs/virtiofsd/-/merge_requests/197

xref coreos/coreos-assembler#3428 (comment)

.cci.jenkinsfile

@@ -26,14 +26,14 @@ codestyle: {
 
 def nhosts = 4
 def mem = (nhosts * 1536) + 512
-cosaPod(runAsUser: 0, memory: "${mem}Mi", cpu: "${nhosts}") {
+cosaPod(memory: "${mem}Mi", cpu: "${nhosts}") {
   stage("Unit Tests") {
     checkout scm
     unstash 'rpms'
     // run this stage first without installing deps, so we match exactly the cosa pkgset
     // (+ our built rpm-ostree)
     shwrap("""
-      dnf install -y *.rpm
+      sudo dnf install -y *.rpm
       # Cross check we enabled the unit tests
       rpm-ostree --version | grep bin-unit-tests
       rpm-ostree testutils c-units
@@ -51,11 +51,11 @@ cosaPod(runAsUser: 0, memory: "${mem}Mi", cpu: "${nhosts}") {
     """)
   }
   stage("Install Deps") {
-    shwrap("ci/install-test-deps.sh")
+    shwrap("sudo ci/install-test-deps.sh")
   }
   stage("Kola") {
     // TODO upstream this into coreos-ci-lib
-    shwrap("make -C tests/kolainst install")
+    shwrap("sudo make -C tests/kolainst install")
     kola(cosaDir: "${env.WORKSPACE}", extraArgs: "ext.rpm-ostree.*", parallel: nhosts)
   }
   stage("vmcheck") {