feat(helm): update cilium group

| datasource | package                         | from    | to      |
| ---------- | ------------------------------- | ------- | ------- |
| helm       | cilium                          | 1.14.5  | 1.15.7  |
| docker     | quay.io/cilium/cilium           | v1.14.5 | v1.15.7 |
| docker     | quay.io/cilium/operator-generic | v1.14.5 | v1.15.7 |

cluster/apps/kube-system/cilium/helm-release.yaml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: cilium
-      version: 1.14.5
+      version: 1.15.7
       sourceRef:
         kind: HelmRepository
         name: cilium

infrastructure/ansible/roles/k3s/templates/cilium/cilium-installation.yaml.j2

@@ -461,7 +461,7 @@ spec:
             topologyKey: kubernetes.io/hostname
       containers:
       - name: cilium-agent
-        image: "quay.io/cilium/cilium:v1.14.5@sha256:d3b287029755b6a47dee01420e2ea469469f1b174a2089c10af7e5e9289ef05b"
+        image: "quay.io/cilium/cilium:v1.15.7@sha256:2e432bf6879feb8b891c497d6fd784b13e53456017d2b8e4ea734145f0282ef0"
         imagePullPolicy: IfNotPresent
         command:
         - cilium-agent
@@ -580,7 +580,7 @@ spec:
       # Required to mount cgroup2 filesystem on the underlying Kubernetes node.
       # We use nsenter command with host's cgroup and mount namespaces enabled.
       - name: mount-cgroup
-        image: "quay.io/cilium/cilium:v1.14.5@sha256:d3b287029755b6a47dee01420e2ea469469f1b174a2089c10af7e5e9289ef05b"
+        image: "quay.io/cilium/cilium:v1.15.7@sha256:2e432bf6879feb8b891c497d6fd784b13e53456017d2b8e4ea734145f0282ef0"
         imagePullPolicy: IfNotPresent
         env:
         - name: CGROUP_ROOT
@@ -607,7 +607,7 @@ spec:
         securityContext:
           privileged: true
       - name: clean-cilium-state
-        image: "quay.io/cilium/cilium:v1.14.5@sha256:d3b287029755b6a47dee01420e2ea469469f1b174a2089c10af7e5e9289ef05b"
+        image: "quay.io/cilium/cilium:v1.15.7@sha256:2e432bf6879feb8b891c497d6fd784b13e53456017d2b8e4ea734145f0282ef0"
         imagePullPolicy: IfNotPresent
         command:
         - /init-container.sh
@@ -765,7 +765,7 @@ spec:
             topologyKey: kubernetes.io/hostname
       containers:
       - name: cilium-operator
-        image: quay.io/cilium/operator-generic:v1.14.5@sha256:303f9076bdc73b3fc32aaedee64a14f6f44c8bb08ee9e3956d443021103ebe7a
+        image: quay.io/cilium/operator-generic:v1.15.7@sha256:6840a6dde703b3e73dd31e03390327a9184fcb888efbad9d9d098d65b9035b54
         imagePullPolicy: IfNotPresent
         command:
         - cilium-operator-generic