Merged revision(s) 25175 from trunk/OpenMPT:

[Reg] build: CI: Cirrus-CI: Remove Cirrus-CI. It will shutdown 2026-06-01. See <https://cirruslabs.org/>.
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git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.32@25176 56274372-70c3-4bfc-bfc3-4c3a0b034d27

Author: manxorist