Cypress with security

[bowenlan-amzn]

Issue #, if available:

Description of changes:
This PR enable IM kibana plugin to run cypress with security: yarn run cypress open --env security_enabled=true
It also stablize the test, previously there are always some test failing in github action.

For cypress with security plugin, since we haven't integrate security with IM plugin, once we integrated, these cypress test will need further updated, like we cannot directly modify the managed-index start_time by updating .opendistro-ism-config which gonna be a system index.

Thanks to @tlfeng cypress change for alerting plugin

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[tlfeng]

Looks good, and it's amazing you fixed the flaky test! 🎉