[Feature Request] [Star Tree] Optimise StarTreeFilter in bool queries by combining overlapping/adjacent ranges

[imRishN]

Is your feature request related to a problem? Please describe

Currently, with PR #17941, when processing bool queries (especially SHOULD clauses), we maintain separate DimensionFilters even when they could be represented more efficiently. We should optimise this by combining filters where possible.

Describe the solution you'd like

Add union operations in DimensionFilterMergerUtils

Examples:

1. Range Combination:
   Current: status: [RangeMatchDimFilter(5,10), RangeMatchDimFilter(6,8)]
   Optimized: status: [RangeMatchDimFilter(5,10)]

2. Adjacent Ranges:
   Current: status: [RangeMatchDimFilter(1,5), RangeMatchDimFilter(5,10)]
   Optimized: status: [RangeMatchDimFilter(1,10)]

3. ExactMatch Consolidation:
   Current: status: [ExactMatchDimFilter([200]), ExactMatchDimFilter([201,202])]
   Optimized: status: [ExactMatchDimFilter([200,201,202])]

Note: This is an optimization task and doesn't affect functionality.

Related component

No response

Describe alternatives you've considered

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Additional context

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