Mock lodash debounce to fix embedded_visualize_handler unstable tests

[lizozom]

Summary

Occasionally and inconsistently, when running embedded_visualize_handler jest tests, you wound get the following error:

Ran 100000 timers, and there are still more! Assuming we’ve hit an infinite recursion and bailing out.

Seems like this error seem happens when using lodash.debounce and runAllTimers together. This version uses a solution suggested on the thread: mocking lodash.debounce and removing runAllTimers altogether.

Checklist

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• This was checked for cross-browser compatibility, including a check against IE11
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• Unit or functional tests were updated or added to match the most common scenarios
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For maintainers

• This was checked for breaking API changes and was labeled appropriately
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[elasticmachine]

Pinging @elastic/kibana-app-arch

[elasticmachine]

Pinging @elastic/kibana-test-triage

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request

[ppisljar]

LGTM