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

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

server/channels/app/file_bench_test.go

@@ -83,7 +83,7 @@ func BenchmarkUploadFile(b *testing.B) {
 			title: "raw-ish DoUploadFile",
 			f: func(b *testing.B, n int, data []byte, ext string) {
 				info1, err := th.App.DoUploadFile(th.Context, time.Now(), teamID, channelID,
-					userID, fmt.Sprintf("BenchmarkDoUploadFile-%d%s", n, ext), data)
+					userID, fmt.Sprintf("BenchmarkDoUploadFile-%d%s", n, ext), data, true)
 				if err != nil {
 					b.Fatal(err)
 				}