This removes the remaining cirrus tasks.
This is a partial backport of secp256k1#1409
https://github.com/bitcoin-core/secp256k1/pull/1409/changes/c22ac27529003e828d8a873ca6439f6978e2e1be
https://github.com/bitcoin-core/secp256k1/pull/1409/changes/61fc3a2dc883a5ffda43658337ec94d3306eb77f