Enable SQL support for WHEN NOT MATCHED BY SOURCE

# Description
The SQL syntax for merge with WHEN NOT MATCHED BY SOURCE clauses was shipped with Spark 3.4. Now that Delta picked up Spark 3.4, we can enable SQL support and mix in SQL tests for WHEN NOT MATCHED BY SOURCE.

Existing tests for WHEN NOT MATCHED BY SOURCE are now run in the Merge SQL suite.

Closes #1740

GitOrigin-RevId: 1ddd1216e13f854901da47896936527618ea4dca

Author: johanl-db

core/src/main/scala/org/apache/spark/sql/delta/DeltaAnalysis.scala

@@ -459,6 +459,18 @@ class DeltaAnalysis(session: SparkSession)
             s"${other.prettyName} clauses cannot be part of the WHEN NOT MATCHED clause in MERGE " +
              "INTO.")
       }
+      val notMatchedBySourceActions = merge.notMatchedBySourceActions.map {
+        case update: UpdateAction =>
+          DeltaMergeIntoNotMatchedBySourceUpdateClause(
+            update.condition,
+            DeltaMergeIntoClause.toActions(update.assignments))
+        case delete: DeleteAction =>
+          DeltaMergeIntoNotMatchedBySourceDeleteClause(delete.condition)
+        case other =>
+          throw new IllegalArgumentException(
+            s"${other.prettyName} clauses cannot be part of the WHEN NOT MATCHED BY SOURCE " +
+             "clause in MERGE INTO.")
+      }
       // rewrites Delta from V2 to V1
       val newTarget =
         stripTempViewForMergeWrapper(merge.targetTable).transformUp { case DeltaRelation(lr) => lr }
@@ -468,7 +480,7 @@ class DeltaAnalysis(session: SparkSession)
         newTarget,
         merge.sourceTable,
         merge.mergeCondition,
-        matchedActions ++ notMatchedActions
+        matchedActions ++ notMatchedActions ++ notMatchedBySourceActions
       )
 
       DeltaMergeInto.resolveReferencesAndSchema(deltaMerge, conf)(tryResolveReferences(session))

core/src/test/scala/org/apache/spark/sql/delta/MergeIntoSQLSuite.scala

@@ -30,7 +30,8 @@ import org.apache.spark.sql.functions.udf
 import org.apache.spark.sql.internal.SQLConf
 import org.apache.spark.sql.types.{IntegerType, StructField, StructType}
 
-class MergeIntoSQLSuite extends MergeIntoSuiteBase  with DeltaSQLCommandTest
+class MergeIntoSQLSuite extends MergeIntoSuiteBase  with MergeIntoNotMatchedBySourceSuite
+  with DeltaSQLCommandTest
   with DeltaTestUtilsForTempViews {
 
   import testImplicits._