testing/virter: update mockery for Go 1.22 compatibility
Try to fix builder error: https://build.alpinelinux.org/buildlogs/build-edge-x86/testing/virter/virter-0.26.0-r1.log
Try to fix builder error: https://build.alpinelinux.org/buildlogs/build-edge-x86/testing/virter/virter-0.26.0-r1.log