fix(cubejs): Fixes configuration such that CUBEJS_PRE_AGGREGATIONS_BUILDER always enables preaggregation building

[cristipp]

Check List

• [x] Tests has been run in packages where changes made if available
• [x] Linter has been run for changed code
• [x] Tests for the changes have been added if not covered yet
• [ ] Docs have been added / updated if required

Issue Reference this PR resolves

N/A

Description of Changes Made (if issue reference is not provided)

Fixes configuration such that CUBEJS_PRE_AGGREGATIONS_BUILDER always enables preaggregation building.

For example, the next configuration always builds preaggregations before answering a query, including on-the-fly if the necessary preaggregations are not built yet.

CUBEJS_ROLLUP_ONLY: 'true',
CUBEJS_REFRESH_WORKER: 'false',
CUBEJS_PRE_AGGREGATIONS_BUILDER: 'true',