chore(ci): run acceptance tests in GitHub workflows

[phil-davis]

This is a first part of what will be needed:

• run an Apache server
• use owncloudci/core docker image (in an action) to install owncloud core from a tarball (daily-master-qa)
• copy the app code into the installed core
• enable the app
• get an environment set up that has the test code (acceptance test code from core, and for the app)
• run API test scenarios
• start selenium and other pieces started to support webUI tests
• run webui test scenarios

Next:

• write notes about what I have done
• use this is another app, and see what extra flexibility is needed

[phil-davis]

Note: 412 responses have string(31) "{"message":"CSRF check failed"}" in the response.
Need to do something about CSRF setting.
https://github.com/owncloud/impersonate/actions/runs/23783076997/job/69299894063?pr=256