Add --show-history flag to debug kustomization

Signed-off-by: Matheus Pimenta <matheuscscp@gmail.com>

cmd/flux/testdata/debug_helmrelease/history-empty.golden.yaml

@@ -1,2 +1,2 @@
-# History documentation: https://fluxcd.io/flux/components/helm/helmreleases/#helmrelease-status
+# History documentation: https://fluxcd.io/flux/components/helm/helmreleases/#history
 []

cmd/flux/testdata/debug_helmrelease/history.golden.yaml

@@ -1,4 +1,4 @@
-# History documentation: https://fluxcd.io/flux/components/helm/helmreleases/#helmrelease-status
+# History documentation: https://fluxcd.io/flux/components/helm/helmreleases/#history
 - appVersion: 6.0.0
   chartName: podinfo
   chartVersion: 6.0.0

cmd/flux/testdata/debug_kustomization/history-empty.golden.yaml

@@ -0,0 +1,2 @@
+# History documentation: https://fluxcd.io/flux/components/kustomize/kustomizations/#history
+[]

cmd/flux/testdata/debug_kustomization/history.golden.yaml

@@ -0,0 +1,17 @@
+# History documentation: https://fluxcd.io/flux/components/kustomize/kustomizations/#history
+- digest: sha256:def456
+  firstReconciled: "2024-01-01T09:00:00Z"
+  lastReconciled: "2024-01-01T10:00:00Z"
+  lastReconciledDuration: 300ms
+  lastReconciledStatus: success
+  metadata:
+    originRevision: abc123
+  totalReconciliations: 1
+- digest: sha256:ghi012
+  firstReconciled: "2024-02-01T09:00:00Z"
+  lastReconciled: "2024-02-01T10:00:00Z"
+  lastReconciledDuration: 500ms
+  lastReconciledStatus: failure
+  metadata:
+    originRevision: xyz789
+  totalReconciliations: 10

cmd/flux/testdata/debug_kustomization/objects.yaml

@@ -44,6 +44,47 @@ spec:
       - kind: Secret
         name: test
 ---
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: test-with-history
+  namespace: {{ .fluxns }}
+spec:
+  sourceRef:
+    kind: GitRepository
+    name: test
+  interval: 1m
+  path: "./"
+  prune: true
+  postBuild:
+   substitute:
+     TEST_OVERRIDE: "in-line"
+     TEST_INLINE: "in-line"
+   substituteFrom:
+     - kind: ConfigMap
+       name: test
+     - kind: Secret
+       name: test
+status:
+  observedGeneration: 1
+  history:
+    - digest: sha256:def456
+      firstReconciled: "2024-01-01T09:00:00Z"
+      lastReconciled: "2024-01-01T10:00:00Z"
+      lastReconciledDuration: 300ms
+      lastReconciledStatus: success
+      metadata:
+        originRevision: abc123
+      totalReconciliations: 1
+    - digest: sha256:ghi012
+      firstReconciled: "2024-02-01T09:00:00Z"
+      lastReconciled: "2024-02-01T10:00:00Z"
+      lastReconciledDuration: 500ms
+      lastReconciledStatus: failure
+      metadata:
+        originRevision: xyz789
+      totalReconciliations: 10
+---
 apiVersion: v1
 kind: ConfigMap
 metadata: