feat(rust/sedona-functions,c/sedona-geos): Add remaining required sedona bench functions

[paleolimbot]

Apologies for stuffing these all in the same PR (I didn't think they would be as complicated as they were!). This PR adds ST_Collect(), ST_MakeLine(), and ST_ConvexHull().

A few other things were required to make these cleanly implemented:

• Benchmark configuration for MultiPoint input (none of the existing random geometries were realistic input)
• Iterating over geometry arrays where the array is of NULL type (happens when a SQL literal NULL makes its way to a scalar function and the scalar function calls .to_array(num_iterations).

[Copilot]

Pull Request Overview

This PR adds three remaining sedona bench functions: ST_Collect(), ST_MakeLine(), and ST_ConvexHull() to support benchmark completeness. It also addresses technical requirements for NULL array iteration and adds MultiPoint benchmark configuration.

• Implements ST_Collect() aggregate function for collecting geometries into multi-geometry types
• Implements ST_MakeLine() scalar function for creating linestrings from points and other geometries
• Implements ST_ConvexHull() scalar function using GEOS for computing convex hulls

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
rust/sedona-testing/src/benchmark_util.rs	Adds MultiPoint benchmark configuration and updates geometry building methods
rust/sedona-geometry/src/types.rs	Adds try_from_geom() method for GeometryTypeAndDimensions
rust/sedona-geometry/src/analyze.rs	Refactors geometry analysis to use new try_from_geom() method
rust/sedona-functions/src/st_makeline.rs	New ST_MakeLine() scalar function implementation
rust/sedona-functions/src/st_collect.rs	New ST_Collect() aggregate function implementation
rust/sedona-functions/src/sd_format.rs	Fixes trailing comma in assertion
rust/sedona-functions/src/register.rs	Registers new functions in function set
rust/sedona-functions/src/lib.rs	Adds module declarations for new functions
rust/sedona-functions/src/executor.rs	Adds NULL array type handling for iteration
rust/sedona-functions/benches/native-functions.rs	Adds benchmarks for new functions
python/sedonadb/tests/functions/test_functions.py	Adds tests for ST_ConvexHull and ST_MakeLine
python/sedonadb/tests/functions/test_aggregate.py	New test file for ST_Collect aggregate function
c/sedona-geos/src/st_convexhull.rs	New ST_ConvexHull() implementation using GEOS
c/sedona-geos/src/register.rs	Registers ST_ConvexHull in GEOS function set
c/sedona-geos/src/lib.rs	Adds module declaration for ST_ConvexHull
c/sedona-geos/benches/geos-functions.rs	Adds benchmark for ST_ConvexHull

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