ci: update WP Core Tests workflow

[sjinks]

This PR fixes the broken WP Core tests.

[codecov]

Codecov Report

Merging #4883 (a51a6b7) into develop (9e4e16e) will increase coverage by 0.07%.
Report is 1 commits behind head on develop.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #4883      +/-   ##
=============================================
+ Coverage      29.06%   29.13%   +0.07%     
  Complexity      4705     4705              
=============================================
  Files            276      276              
  Lines          20749    20749              
=============================================
+ Hits            6030     6045      +15     
+ Misses         14719    14704      -15     

see 7 files with indirect coverage changes

[sjinks]

It looks like this is caused by a regression introduced in PHPUnit 9.6.13:

PHPUnit 9.6.12:

$ composer require --dev phpunit/phpunit:9.6.12
./composer.json has been updated
Running composer update phpunit/phpunit
Loading composer repositories with package information
Updating dependencies
Lock file operations: 0 installs, 1 update, 0 removals
  - Upgrading phpunit/phpunit (9.6.0 => 9.6.12)
Writing lock file
Installing dependencies from lock file (including require-dev)
Package operations: 0 installs, 1 update, 0 removals
  - Upgrading phpunit/phpunit (9.6.0 => 9.6.12): Extracting archive
Generating autoload files
25 packages you are using are looking for funding.
Use the `composer fund` command to find out more!
No security vulnerability advisories found

$ node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit --verbose -c phpunit.xml.dist --filter test_is_allowed_dir_should_return_true_if_open_basedir_is_set_and_path_is_allowed --debug
[+] Running 1/0
 ⠿ Container wordpress-develop-mysql-1  Running                                                                                                                                                                                                                                     0.0s
Installing...
Running as single site... To run multisite, use -c tests/phpunit/multisite.xml
Not running ajax tests. To execute these, use --group ajax.
Not running ms-files tests. To execute these, use --group ms-files.
Not running external-http tests. To execute these, use --group external-http.
PHPUnit 9.6.12 by Sebastian Bergmann and contributors.

Runtime:       PHP 7.4.33
Configuration: phpunit.xml.dist
Warning:       Your XML configuration validates against a deprecated schema.
Suggestion:    Migrate your XML configuration using "--migrate-configuration"!

Test 'Tests_Admin_WpAutomaticUpdater::test_is_allowed_dir_should_return_true_if_open_basedir_is_set_and_path_is_allowed' started
Test 'Tests_Admin_WpAutomaticUpdater::test_is_allowed_dir_should_return_true_if_open_basedir_is_set_and_path_is_allowed' ended


Time: 00:02.289, Memory: 160.50 MB

OK (1 test, 1 assertion)

PHPUnit 9.6.13:

$ composer require --dev phpunit/phpunit:9.6.13
./composer.json has been updated
Running composer update phpunit/phpunit
Loading composer repositories with package information
Updating dependencies
Lock file operations: 0 installs, 1 update, 0 removals
  - Upgrading phpunit/phpunit (9.6.12 => 9.6.13)
Writing lock file
Installing dependencies from lock file (including require-dev)
Package operations: 0 installs, 1 update, 0 removals
  - Upgrading phpunit/phpunit (9.6.12 => 9.6.13): Extracting archive
Generating autoload files
25 packages you are using are looking for funding.
Use the `composer fund` command to find out more!
No security vulnerability advisories found

$ node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit --verbose -c phpunit.xml.dist --filter test_is_allowed_dir_should_return_true_if_open_basedir_is_set_and_path_is_allowed --debug
[+] Running 1/0
 ⠿ Container wordpress-develop-mysql-1  Running                                                                                                                                                                                                                                     0.0s
Installing...
Running as single site... To run multisite, use -c tests/phpunit/multisite.xml
Not running ajax tests. To execute these, use --group ajax.
Not running ms-files tests. To execute these, use --group ms-files.
Not running external-http tests. To execute these, use --group external-http.
PHPUnit 9.6.13 by Sebastian Bergmann and contributors.

Runtime:       PHP 7.4.33
Configuration: phpunit.xml.dist
Warning:       Your XML configuration validates against a deprecated schema.
Suggestion:    Migrate your XML configuration using "--migrate-configuration"!

Test 'Tests_Admin_WpAutomaticUpdater::test_is_allowed_dir_should_return_true_if_open_basedir_is_set_and_path_is_allowed' started
Test 'Tests_Admin_WpAutomaticUpdater::test_is_allowed_dir_should_return_true_if_open_basedir_is_set_and_path_is_allowed' ended


Time: 00:02.337, Memory: 163.50 MB

There was 1 failure:

1) Tests_Admin_WpAutomaticUpdater::test_is_allowed_dir_should_return_true_if_open_basedir_is_set_and_path_is_allowed
Test was run in child process and ended unexpectedly

phpvfscomposer:///var/www/vendor/phpunit/phpunit/phpunit:106