Deprecate OwncloudClient - DirectEditing

[ZetaTom]

This is one of a series of pull requests which aim to replace all instances of OwnCloudClient with NextcloudClient. The reason for this change is that the newer NextcloudClient uses OkHttp, replacing the outdated Jackrabbit methods.

Specifically, this pull request implements the following:

• changes related to direct editing
• see #1271

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 71.79487% with 11 lines in your changes missing coverage. Please review.

Project coverage is 49.25%. Comparing base (cda1b08) to head (4a78745).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1273      +/-   ##
============================================
- Coverage     49.28%   49.25%   -0.04%     
- Complexity     1002     1003       +1     
============================================
  Files           208      208              
  Lines          7830     7823       -7     
  Branches       1015     1015              
============================================
- Hits           3859     3853       -6     
- Misses         3417     3418       +1     
+ Partials        554      552       -2     

Files	Coverage Δ
...ectediting/DirectEditingObtainRemoteOperation.java	60.86% <50.00%> (+0.86%)	:arrow_up:
...tediting/DirectEditingOpenFileRemoteOperation.java	80.76% <83.33%> (-0.72%)	:arrow_down:
...diting/DirectEditingCreateFileRemoteOperation.java	78.12% <76.92%> (+1.65%)	:arrow_up:
...ctEditingObtainListOfTemplatesRemoteOperation.java	64.00% <60.00%> (+1.03%)	:arrow_up:

... and 3 files with indirect coverage changes

[github-actions[bot]]

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[github-actions[bot]]

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	34	34
Dodgy code	26	26
Internationalization	6	6
Malicious code vulnerability	49	49
Multithreaded correctness	3	3
Performance	8	8
Total	161	161

[github-actions[bot]]

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	34	34
Dodgy code	26	26
Internationalization	6	6
Malicious code vulnerability	49	49
Multithreaded correctness	3	3
Performance	8	8
Total	161	161

[github-actions[bot]]

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	34	34
Dodgy code	26	26
Internationalization	6	6
Malicious code vulnerability	49	49
Multithreaded correctness	3	3
Performance	8	8
Total	161	161

[github-actions[bot]]

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	34	34
Dodgy code	26	26
Internationalization	6	6
Malicious code vulnerability	49	49
Multithreaded correctness	3	3
Performance	8	8
Total	161	161