[8.x](backport #4012) [Integration testing] Remove AltErr and only ex…

…pect 400 from ES bulk API (#4030)

* [Integration testing] Remove AltErr and only expect 400 from ES bulk API (#4012)

* Remove AltErr

* Fixed error type

(cherry picked from commit 1ae9ab6)

# Conflicts:
#	internal/pkg/bulk/bulk_integration_test.go

* Update bulk_integration_test.go

Fix mergify mess

* Printing out filename for debugging

* Fixing up conflicts

* Trigger Build

---------

Co-authored-by: Shaunak Kashyap <[email protected]>
Co-authored-by: Julien Lind <[email protected]>

internal/pkg/bulk/bulk_integration_test.go

@@ -69,8 +69,8 @@ func TestBulkCreate(t *testing.T) {
 			Name:  "Invalid utf-8",
 			Index: string([]byte{0xfe, 0xfe, 0xff, 0xff}),
 			Err: es.ErrElastic{
-				Status: 500,
-				Type:   "json_parse_exception",
+				Status: 400,
+				Type:   "parse_exception",
 			},
 		},
 		{
@@ -100,7 +100,7 @@ func TestBulkCreate(t *testing.T) {
 			// Create
 			id, err := bulker.Create(ctx, test.Index, test.ID, sampleData)
 			if !EqualElastic(test.Err, err) {
-				t.Fatal(err)
+				t.Fatalf("expected error: %+v, got: %+v", test.Err, err)
 			}
 			if err != nil {
 				return