Keep the same mtime as in the ownCloud's FS for files inside

[jvillafanez]

Description

Keep the mtime of the files and folders inside the downloaded tarball

Related Issue

https://github.com/owncloud/enterprise/issues/3939

Motivation and Context

How Has This Been Tested?

Manually tested both in mac and linux. Both the tar and zip files keeps the mtime of the files.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE

[update-docs]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[codecov]

Codecov Report

Merging #37222 into master will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master   #37222      +/-   ##
============================================
- Coverage     64.87%   64.87%   -0.01%     
- Complexity    19146    19147       +1     
============================================
  Files          1269     1269              
  Lines         74947    74957      +10     
  Branches       1331     1331              
============================================
+ Hits          48625    48626       +1     
- Misses        25930    25939       +9     
  Partials        392      392              

Flag	Coverage Δ	Complexity Δ
#javascript	54.14% <ø> (ø)	0.00 <ø> (ø)
#phpunit	66.06% <0.00%> (-0.01%)	19147.00 <3.00> (+1.00)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
lib/private/Streamer.php	0.00% <0.00%> (ø)	13.00 <3.00> (ø)
lib/private/legacy/files.php	0.00% <0.00%> (ø)	67.00 <0.00> (ø)
...les_sharing/lib/Controller/RemoteOcsController.php	95.31% <0.00%> (+0.07%)	17.00% <0.00%> (+1.00%)

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