MM-57512: Disable content extraction during import (#26619)

https://mattermost.atlassian.net/browse/MM-57512
```release-note
NONE
```

server/channels/app/import_test.go

@@ -459,7 +459,7 @@ func BenchmarkBulkImport(b *testing.B) {
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		err, _ := th.App.BulkImportWithPath(th.Context, jsonFile, nil, false, runtime.NumCPU(), dir)
+		err, _ := th.App.BulkImportWithPath(th.Context, jsonFile, nil, false, true, runtime.NumCPU(), dir)
 		require.Nil(b, err)
 	}
 	b.StopTimer()
@@ -497,7 +497,7 @@ func TestImportBulkImportWithAttachments(t *testing.T) {
 
 	th.App.UpdateConfig(func(cfg *model.Config) { cfg.TeamSettings.MaxUsersPerTeam = model.NewInt(1000) })
 
-	appErr, _ := th.App.BulkImportWithPath(th.Context, jsonFile, importZipReader, false, 1, model.ExportDataDir)
+	appErr, _ := th.App.BulkImportWithPath(th.Context, jsonFile, importZipReader, false, true, 1, model.ExportDataDir)
 	require.Nil(t, appErr)
 
 	adminUser, appErr := th.App.GetUserByUsername("sysadmin")