fix: consume groupfolder properties as an array

[nabim777]

Description

1. Support groupfolders master branch

The data structure to access the groupfolder has been changed in nextcloud/groupfolders#3849.
Implemented a method to convert the groupfolder entry into an array so that we maintain the compatibility with older versions.

2. Fix for unit test failre:

Nextcloud master updated the php-http/guzzle7-adapter in nextcloud/server#53866
which included the changes in return type for php-fig/http-message. see: php-fig/http-message@1.1...2.0

So, this PR fixes a php unit test failure in OpenProjectControllerTest::testIsValidOpenProjectInstanceException, where the mocked ResponseInterface::getBody() method was returning a string.

According to Psr, getBody() must return an instance of Psr\Http\Message\StreamInterface. Returning a string was causing the following PHPUnit error:

1) Error
The data provider specified for OCA\OpenProject\Controller\OpenProjectControllerTest::testIsValidOpenProjectInstanceException is invalid.
PHPUnit\Framework\MockObject\IncompatibleReturnValueException: Method getBody may not return value of type string, its declared return type is "Psr\Http\Message\StreamInterface"
/__w/integration_openproject/integration_openproject/integration_openproject/server/apps/integration_openproject/tests/lib/Controller/OpenProjectControllerTest.php:163

Related Issue or Workpackage

• Fixes 65844

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Updated CHANGELOG.md file

[saw-jan]

The changes are good 👍
Nextcloud master updated the php-http/guzzle7-adapter in nextcloud/server#53866
which included the changes in return type for php-fig/http-message. see: php-fig/http-message@1.1...2.0

@nabim777 Please update the description when relevant information

[nabim777]

Need to fix another CI failure in this PR

[saw-jan]

Need to fix another CI failure in this PR

we will look at them in next Pr once the CI is stable with this one

[github-actions]

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