fix: encryption/decryption for non-auth plugins in consumer #720

Job	Run time
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/http3/admin)	5m 22s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/plugin/[a-k]*)	5m 11s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/plugin/[l-z]*)	5m 23s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/admin t/cli t/config-center-yaml...	5m 23s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/node t/pubsub t/router t/script ...	5m 19s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/http3/admin)	5m 23s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/plugin/[a-k]*)	5m 10s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/plugin/[l-z]*)	5m 10s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/admin t/cli t/config-center-yaml t/cont...	5m 24s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/node t/pubsub t/router t/script t/secre...	5m 23s
	53m 8s

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