fix: correct handling of removed targets (#9824)

# Which Problems Are Solved

In Actions v2, if a target is removed, which is still used in an
execution, the target is still listed when list executions.

# How the Problems Are Solved

Removed targets are now also removed from the executions.

# Additional Changes

To be sure the list executions include a check if the target is still
existing.

# Additional Context

None

Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/query/projection/execution_test.go

@@ -7,6 +7,7 @@ import (
 	"github.com/zitadel/zitadel/internal/eventstore/handler/v2"
 	exec "github.com/zitadel/zitadel/internal/repository/execution"
 	"github.com/zitadel/zitadel/internal/repository/instance"
+	"github.com/zitadel/zitadel/internal/repository/target"
 	"github.com/zitadel/zitadel/internal/zerrors"
 )
 
@@ -79,6 +80,35 @@ func TestExecutionProjection_reduces(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "reduceTargetRemoved",
+			args: args{
+				event: getEvent(
+					testEvent(
+						target.RemovedEventType,
+						target.AggregateType,
+						[]byte(`{}`),
+					),
+					eventstore.GenericEventMapper[target.RemovedEvent],
+				),
+			},
+			reduce: (&executionProjection{}).reduceTargetRemoved,
+			want: wantReduce{
+				aggregateType: eventstore.AggregateType("target"),
+				sequence:      15,
+				executer: &testExecuter{
+					executions: []execution{
+						{
+							expectedStmt: "DELETE FROM projections.executions1_targets WHERE (instance_id = $1) AND (target_id = $2)",
+							expectedArgs: []interface{}{
+								"instance-id",
+								"agg-id",
+							},
+						},
+					},
+				},
+			},
+		},
 		{
 			name: "reduceExecutionRemoved",
 			args: args{