[Addon] fix fluxcd cannot be disabled with 1.7.0 version

[wangyikewxgm]

fix fluxcd cannot be disabled with 1.7.0 version, rely on the feature of core controller

Please hold unit kubevela release 1.7.0

Signed-off-by: wangyike.wyk wangyike.wyk@alibaba-inc.com

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