[TSVB] Rollup Search - override index pattern functionality is not working with Rollup search

[alexwizp]

Summary

• Design issue was fixed. Panel Index Pattern shouldn't be saved in SearchRequest object. Instead of that search request should be executed with two arguments: request body + index for which we are going to execute the search query.

From:

     const { searchStrategy, capabilities } = await SearchStrategiesRegister.getViableStrategy(req, panelIndexPattern);
       const searchRequest = searchStrategy.getSearchRequest(req, **panelIndexPattern**);

       searchRequest.search({body});

To:

   const { searchStrategy, capabilities } = await SearchStrategiesRegister.getViableStrategyForPanel(req, panel);
  const searchRequest = searchStrategy.getSearchRequest(req);

     searchRequest.search([{body, index}]);

• batchRequestsSupport property was removed.
• For getting the SearchStrategy we use the extractIndexPatterns method. This method returns a full list of used indexes for visualization.

Screen:

Depends on #36081

Checklist

• This was checked for cross-browser compatibility, including a check against IE11
• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• This was checked for keyboard-only and screenreader accessibility

For maintainers

• This was checked for breaking API changes and was labeled appropriately
• This includes a feature addition or change that requires a release note and was labeled appropriately

[alexwizp]

retest

[elasticmachine]

💚 Build Succeeded

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

[elasticmachine]

💚 Build Succeeded

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

[elasticmachine]

Pinging @elastic/kibana-app

[PhilippBaranovskiy]

I'm not familiar with Rollup logic, however, the code looks good to me.

[markov00]

Overall code lgtm. I've added few comments to address before merge

[elasticmachine]

💚 Build Succeeded

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