feat: add configmap with mobster task git revision

components/mobster/OWNERS

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+# See the OWNERS docs: https://go.k8s.io/owners
+
+approvers:
+- Allda
+- jedinym
+
+reviewers:
+- Allda
+- jedinym

components/mobster/kustomization.yaml

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+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - role.yaml
+  - rolebinding.yaml
+generatorOptions:
+  disableNameSuffixHash: true
+configMapGenerator:
+  - name: mobster-defaults
+    namespace: mobster
+    literals:
+      - mobster_tasks_git_revision=8991d2e79eeb3f0edc91b77a798d1d228a448fce

components/mobster/role.yaml

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+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    rbac.authorization.k8s.io/aggregate-to-view: "true"
+  name: mobster-configmap-viewer-role
+rules:
+- apiGroups:
+  - ""
+  resourceNames:
+  - mobster-defaults
+  resources:
+  - configmaps
+  verbs:
+  - get
+  - list
+  - watch

components/mobster/rolebinding.yaml

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+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: public-mobster-cm
+  namespace: mobster
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: mobster-configmap-viewer-role
+subjects:
+  - apiGroup: rbac.authorization.k8s.io
+    kind: Group
+    name: system:authenticated