feat(dbal): Add spawnColumns

Signed-off-by: Carl Schwan <carl@carlschwan.eu>

lib/private/DB/Schema/Index.php

@@ -60,6 +60,11 @@ class Index implements IIndex {
 		return $this->index->hasColumnAtPosition($name, $position);
 	}
 
+	#[\Override]
+	public function spansColumns(array $columnNames): bool {
+		return $this->index->spansColumns($columnNames);
+	}
+
 	/**
 	 * Forwards any method not declared on IIndex to the wrapped Doctrine
 	 * DBAL index, e.g. mutators like `addFlag()` or `removeFlag()` that are

lib/public/DB/Schema/IIndex.php

@@ -62,4 +62,13 @@ interface IIndex {
 	 * @since 35.0.0
 	 */
 	public function hasColumnAtPosition(string $name, int $position = 0): bool;
+
+	/**
+	 * Returns whether the given column names exactly match the columns this index spans,
+	 * regardless of order.
+	 *
+	 * @param list<non-empty-lowercase-string> $columnNames
+	 * @since 35.0.0
+	 */
+	public function spansColumns(array $columnNames): bool;
 }