Check CI of legacy versions

[nickvergessen]

• 28 has a problem: https://github.com/nextcloud/spreed/actions/runs/20135148963/job/57786411255
  most likely pcre extension missing and therefore creating output on CLI which breaks parsing JSON outputs
• 30 repeatingly failed to install oracle: [stable30] fix(matterbridge): Check parameters #16525

[nickvergessen]

Oracle might be a temporary github error