[Addon] fluxcd addon support decrypt options in kustomize

[xjx]

support decrypt options in kustomize component:
apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
name: my-secrets
spec:
decryption:
provider: sops
secretRef:
name: sops-gpg
force: false
interval: 10m0s
path: ./clusters/cluster0
prune: true
sourceRef:
kind: GitRepository
name: my-secrets

[xjx]

PR(#735) already merge to master and supported this feature in fluxcd 2.4.0 version