Merge bitcoin-core#362: ci: Disable Cirrus CI

2b1380e ci: Disable Cirrus CI (Hennadii Stepanov)

Pull request description:

  It is not free anymore.

  See: https://cirrus-ci.org/blog/2023/07/17/limiting-free-usage-of-cirrus-ci/

ACKs for top commit:
  jarolrod:
    ACK 2b1380e

Tree-SHA512: 35898d36f6264b671d3bb3838acde8abafdcbe8d6172d36143ecf046796f5487cb1061673a2a8cb768949d65b4bec1342fa471bd32036ce474a64212b526cfc2