disable part files for object stores

[icewind1991]

Renaming the part file to the target file while preserving fileids can't be done for object stores without issues.

To test

• upload a new file to s3 object store
• check the fileid
• overwrite the file with dav upload
• check the fileid again

[rullzer]

This needs more work.

If I checkout this branch we directly create a new version on upload.

[codecov]

Codecov Report

Merging #8715 into master will decrease coverage by 0.07%.
The diff coverage is 0%.

@@             Coverage Diff             @@
##             master   #8715      +/-   ##
===========================================
- Coverage     51.87%   51.8%   -0.08%     
- Complexity    25367   25368       +1     
===========================================
  Files          1607    1607              
  Lines         95154   95156       +2     
  Branches       1379    1379              
===========================================
- Hits          49362   49294      -68     
- Misses        45792   45862      +70

Impacted Files	Coverage Δ	Complexity Δ
...b/private/Files/ObjectStore/ObjectStoreStorage.php	66.66% <0%> (-0.57%)	75 <1> (+1)
lib/private/Files/ObjectStore/Swift.php	0% <0%> (-75%)	8% <0%> (ø)
lib/private/Files/ObjectStore/SwiftFactory.php	0% <0%> (-56.33%)	35% <0%> (ø)
lib/private/Files/Cache/Propagator.php	94.93% <0%> (-1.27%)	16% <0%> (ø)

[icewind1991]

@rullzer fixed

(this probably also was an issue when using s2s sharing)

[rullzer]

Seems to do the trick!