chore(ci): run acceptance tests in GitHub workflows

[phil-davis]

This is where I got up to earlier today, before I started trying to get it all to work with https

The drone pipelines did work without https being set up, so probably best to continue working here to debug why some acceptance tests are failing.

[phil-davis]

I finally go it to pass! Next is to look through this and tidy it up.

[phil-davis]

webUIActivitySharingExternal/publicLinkSharingFederation.feature:8
passed a few commits ago, but on the retry:
https://github.com/owncloud/activity/actions/runs/24455471545/job/71454950256

When the public adds the public link to "%local_server%" as user "Brian" using the webUI        # WebUISharingContext::thePublicAddsThePublicLinkToUsingTheWebUI()
      element click intercepted: Element <a id="change-server" href="#">...</a> is not clickable at point (875, 73). Other element would receive the click: <a id="current-server" href="#">...</a>

But on the latest commit:
https://github.com/owncloud/activity/actions/runs/24660347349/job/72104570289?pr=1237

When the public adds the public link to "%local_server%" as user "Brian" using the webUI        # WebUISharingContext::thePublicAddsThePublicLinkToUsingTheWebUI()
      element not interactable
        (Session info: chrome=74.0.3729.169)
        (Driver info: chromedriver=74.0.3729.6 (255758eccf3d244491b8a1317aa76e1ce10d57e9-refs/branch-heads/3729@{#29}),platform=Linux 6.17.0-1010-azure x86_64) (WebDriver\Exception\ElementNotVisible)

Need to understand what is happening, and why it used to sometimes pass.

[phil-davis]

owncloud log has multiple:

{"reqId":"0zVqhYrdijE2aSrEiTiq","level":3,"time":"2026-04-20T10:10:42+00:00","remoteAddr":"::1","user":"Brian","app":"PHP","method":"GET","url":"\/server\/apps\/activity\/api\/v2\/activity\/all?format=json&previews=true&since=0","message":"Array to string conversion at \/var\/www\/html\/server\/apps\/activity\/lib\/Formatter\/BaseFormatter.php#34"}

First investigate that.