[GH-1754] Clarify ST_MakeValid orientation and collapse behavior

[jiayuasu]

Did you read the Contributor Guide?

Yes, I have read the Contributor Rules and Contributor Development Guide.

Is this PR related to a ticket?

Related to #1754.

What changes were proposed in this PR?

Document that ST_MakeValid may reorder coordinates or reverse polygon ring orientation, including for already-valid inputs. Explain how to apply ST_ForcePolygonCCW or ST_ForcePolygonCW after repair without implying that they restore the original vertex order.

Update the Spark, Flink, Snowflake and Python documentation, and correct reversed keepCollapsed descriptions in Flink, Snowflake and Python. Runtime behavior is unchanged.

How was this patch tested?

• Applicable repository hooks and whitespace checks passed.
• Bilingual MkDocs build passed, and the generated reference pages were checked. Existing missing generated-API documentation and link warnings remain.
• Local Spark 3.4.4 probes confirmed the collapsed-line results with default/true keepCollapsed and CCW orientation after repair with unchanged topology. These used an existing Sedona snapshot JAR, not a fresh JVM build of this commit.

Did this PR include necessary documentation updates?

Yes, this PR updates API documentation and the Python docstring.