EWPP-4991: Update to php8.3

[drishu]

OPENEUROPA-[Insert ticket number here]

Description

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Change log

• Added:
• Changed:
• Deprecated:
• Removed:
• Fixed:
• Security:

Commands

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[kp77]

Hi @drishu,

Looks good. This is not related to the update I think, but I had some issues with running phpunit tests on my local:

1. I had fails when I just ran the tests according to the readme. I had to run the commands run in drone to pass them. Maybe this should be documented in the readme.
2. After I fixed the fails, I had phpunit hung up on Drupal\Tests\oe_showcase\ExistingSiteJavascript\EditorTest::testFormatEditor() without any debug information. I could fix this by adding these 2 lines from drone.yml to the selenium service in docker.compose.yml.

Also, I have the following warning every time I run docker-compose:

WARN[0000] ./oe_showcase/docker-compose.yml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion

We could fix this by removing the version attribute.