This drops the WITH_VALGRIND: 'no' and CTIMETESTS: 'no' overrides from the arm64-debian job. They are left over from when the job ran under QEMU. Without them, the job runs ctime_tests under Valgrind for gcc, clang and both snapshots, as theStack suggested in #1975.
I ran ci/ci.sh with the job's settings on aarch64 (Debian trixie, Valgrind 3.24) with gcc 14.2 and clang 19.1. ctime_tests passes with both. It fails with both after I plant a secret-dependent branch in secp256k1_ecdsa_sig_sign.