Ignore Google Drive's auto generated .tmp.* directories by default

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### Feature description
Tell us how the feature should work

Hi there, well done on the recent release!

It is possible to use Nextcloud Desktop and Google Drive sync on the same client machine and they generally play sensibly together.

But... Google Drive creates the following:

- .tmp.driveupload

and

- .tmp.drivedownload

in *every* folder share you set to sync with Google.

Therefore Nextcloud, being a good sync citizen, proceeds to sync every tmp change made by Google with the Nextcloud server.

The result is a lot of sync "noise" in NC.

Any chance the following pattern can be added to the default ignore list?

`.tmp.*`

If the 0.0000001% of users actually want this to sync they can easily remove the pattern.

Best!