feat: Autogenerate admin api key if not passed #2188

Job	Run time
run ci on redhat ubi (lua-resty-worker-events, t/plugin/[a-k]*)	3m 28s
run ci on redhat ubi (lua-resty-worker-events, t/plugin/[l-z]*)	3m 28s
run ci on redhat ubi (lua-resty-worker-events, t/admin t/cli t/config-center-yaml t/control t/cor...	3m 19s
run ci on redhat ubi (lua-resty-worker-events, t/node t/pubsub t/router t/script t/secret t/strea...	3m 24s
run ci on redhat ubi (lua-resty-events, t/plugin/[a-k]*)	3m 20s
run ci on redhat ubi (lua-resty-events, t/plugin/[l-z]*)	3m 27s
run ci on redhat ubi (lua-resty-events, t/admin t/cli t/config-center-yaml t/control t/core t/deb...	3m 22s
run ci on redhat ubi (lua-resty-events, t/node t/pubsub t/router t/script t/secret t/stream-node ...	3m 21s
	27m 9s

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