[ogr2ogr] Fix promote to multipart logic and add makevalid option (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#58440
Author: @NyakudyaA
QGIS version: 3.40

[ogr2ogr] Fix promote to multipart logic and add makevalid option

PR Description:

Fixes qgis/QGIS#58392

• Add an option for makevalid, off by default
• Raise an exception if Promote and output geometry type are both selected
• Raise an exception if Append and Overwrite are both selected

Commits tagged with [need-docs] or [FEATURE]