[7.x] [Security Solutions][Detection Engine] Fixes pre-packaged rules which contain exception lists to not overwrite user defined lists (#80592) #80733
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… contain exception lists to not overwrite user defined lists (elastic#80592) ## Summary Fixes a bug where when you update your pre-packaged rules you could end up removing any existing exception lists the user might have already added. See: elastic#80417 * Fixes the merge logic so that any exception lists from pre-packaged rules will be additive if they do not already exist on the rule. User based exception lists will not be lost. * Added new backend integration tests for exception lists that did not exist before including ones that test the functionality of exception lists * Refactored some of the code in the `get_rules_to_update.ts` * Refactored some of the integration tests to use helper utils of `countDownES`, and `countDownTest` which simplify the retry logic within the integration tests * Added unit tests to exercise the bug and then the fix. * Added integration tests that fail this logic and then fixed the logic ### Checklist Delete any items that are not applicable to this PR. - [x] [Unit or functional tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html) were updated or added to match the most common scenarios
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Backports the following commits to 7.x: