[feature](function) Add ST_NumGeometries, ST_NumPoints, ST_Geometries functions

[acarofpigs]

… functions

What problem does this PR solve?

Issue Number: ref #48203

Related PR: apache/doris-website#3623

Problem Summary:
Add three new spatial functions for geometry collection operations:

• ST_NumGeometries: Returns the number of sub-geometries in a geometry object.
• ST_NumPoints: Returns the total number of vertices (points) in a geometry object.
• ST_Geometries: Decomposes a geometry object into an array of its sub-geometries.

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes. [docs](function) Add documentation for ST_NumGeometries, ST_NumPoints… doris-website#3623

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[hello-stephen]

Thank you for your contribution to Apache Doris.
Don't know what should be done next? See How to process your PR.

Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
3. What features were added. Why was this function added?
4. Which code was refactored and why was this part of the code refactored?
5. Which functions were optimized and what is the difference before and after the optimization?

[acarofpigs]

run buildall

[acarofpigs]

/review

[hello-stephen]

BE Regression && UT Coverage Report

Increment line coverage 97.01% (130/134) 🎉

Increment coverage report
Complete coverage report

Category	Coverage
Function Coverage	73.69% (27751/37661)
Line Coverage	57.57% (300405/521787)
Region Coverage	54.85% (250579/456843)
Branch Coverage	56.33% (108273/192225)

[acarofpigs]

run buildall

[hello-stephen]

BE UT Coverage Report

Increment line coverage 4.48% (6/134) 🎉

Increment coverage report
Complete coverage report

Category	Coverage
Function Coverage	53.50% (20656/38606)
Line Coverage	37.16% (195159/525203)
Region Coverage	33.52% (152699/455535)
Branch Coverage	34.56% (66589/192654)

[acarofpigs]

run buildall