[stable10] Add drone step to print the server logs in case of failure

[phil-davis]

1. Backport Increase version to 10.1 prealpha #28043 commit 203bb4b

which somehow has never found its way back to stable10

2. Run owncloud-coding-standard on PHP 7.3 just to be the same as in master (we are about to do PHP 7.3 support anyway) We have phan running on PHP 7.0, 7.1, 7.2 which provides us an effective lint check already for those PHP versions.

3. Fixup a comment indent that got different between stable10 and master

[codecov]

Codecov Report

Merging #34792 into stable10 will decrease coverage by 19.16%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##             stable10   #34792       +/-   ##
===============================================
- Coverage        64.2%   45.04%   -19.17%     
===============================================
  Files            1278      116     -1162     
  Lines           76256    11476    -64780     
  Branches         1291     1291               
===============================================
- Hits            48958     5169    -43789     
+ Misses          26919     5928    -20991     
  Partials          379      379

Flag	Coverage Δ	Complexity Δ
#javascript	53.22% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	30.71% <ø> (-34.66%)	0 <ø> (-19885)

Impacted Files	Coverage Δ	Complexity Δ
lib/private/Files/Storage/DAV.php	59.45% <0%> (-21.64%)	0% <0%> (ø)
apps/updatenotification/templates/admin.php
lib/private/Encryption/Keys/Storage.php
lib/private/App/CodeChecker/NodeVisitor.php
lib/private/RedisFactory.php
apps/dav/lib/Avatars/AvatarNode.php
...s/dav/appinfo/Migrations/Version20170202213905.php
apps/dav/lib/Upload/ChunkLocationProvider.php
apps/files/lib/AppInfo/Application.php
apps/systemtags/list.php
... and 1154 more

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #34792 into stable10 will increase coverage by <.01%.
The diff coverage is n/a.

@@              Coverage Diff               @@
##             stable10   #34792      +/-   ##
==============================================
+ Coverage        64.2%    64.2%   +<.01%     
  Complexity      19885    19885              
==============================================
  Files            1278     1278              
  Lines           76256    76256              
  Branches         1291     1291              
==============================================
+ Hits            48958    48959       +1     
+ Misses          26919    26918       -1     
  Partials          379      379

Flag	Coverage Δ	Complexity Δ
#javascript	53.22% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	65.36% <ø> (ø)	19885 <ø> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
lib/private/Server.php	86.65% <0%> (+0.11%)	253% <0%> (ø)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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