Fix running git commands in CI tests under GitHub Actions

[osma]

Reasons for creating this PR

GitHub Actions CI builds are currently failing because some tests are executing git commands, but git refuses to run because of a "dubious ownership" error. The error happens because the PHPUnit tests are run within a container as the root user, but the /app directory is owned by another user (uid 1001).

Here is whoami under the container:

uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel),11(floppy),20(dialout),26(tape),27(video)

Here is ls -l /app:

drwxr-xr-x   15 1001     ntp           4096 Dec 15 13:57 /app

Link to relevant issue(s), if any

• Closes CI builds are failing due to dubious ownership in repository at '/app' #1394

Description of the changes in this PR

The PR fixes the problem by first creating the directory /home/runner which doesn't exist within the container, even though it is the value of the HOME environment variable. Then it executes the command git config --global --add safe.directory /app, which will prevent git from complaining about dubious ownership; this will be stored in the configuration file /home/runner/.gitconfig where subsequent git commands (run from PHPUnit tests) will see it.

Known problems or uncertainties in this PR

n/a

Checklist

• phpUnit tests pass locally with my changes
• I have added tests that show that the new code works, or tests are not relevant for this PR (e.g. only HTML/CSS changes)
• The PR doesn't reduce accessibility of the front-end code (e.g. tab focus, scaling to different resolutions, use of .sr-only class, color contrast)
• The PR doesn't introduce unintended code changes (e.g. empty lines or useless reindentation)

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Base: 71.17% // Head: 71.35% // Increases project coverage by +0.18% 🎉

Coverage data is based on head (ba237a1) compared to base (0a51dd5).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1397      +/-   ##
============================================
+ Coverage     71.17%   71.35%   +0.18%     
  Complexity     1650     1650              
============================================
  Files            32       32              
  Lines          3788     3774      -14     
============================================
- Hits           2696     2693       -3     
+ Misses         1092     1081      -11     

Impacted Files	Coverage Δ
controller/RestController.php	22.26% <0.00%> (-0.12%)	⬇️
controller/Honeypot.php	40.90% <0.00%> (ø)
controller/WebController.php	17.32% <0.00%> (+0.12%)	⬆️
model/ConceptMappingPropertyValue.php	83.67% <0.00%> (+0.84%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.