lalpulsar 6.0.0 on arm64 fails test "testWeave_interpolating"

This seems to be the same problem already reported for 5.0.0 in #584 (closed).

The latest build log is here: https://hypatia.aei.mpg.de/lsc-arm64-bullseye/lalpulsar_6.0.0-1+deb11u0_arm64.--pbuilderlog

It seems the fix from !1967 (merged) (that apparently worked until 5.2.0) didn't make it into the new release?