Simplify test matrix and remove merge queue #2268
Merged
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Currently, PR testing is a two-step process: First the regular PR tests, then the merge group tests. The test suite is flaky and test jobs take a long with limited parallelism, which means you can make a simple PR and 2h later get the notification that the PR failed due to an unrelated (and potentially temporary) error. There were several parts not passing when ran as a regular CI job. CI was failing a lot a blocking effective development. This PR radically simplifies the CI setup.
By additionally changing the required jobs, we can switch to "merge when ready" so you don't need to return to a PR to check if CI is ready.