oci-runtime-tools: skip the version check for oci-runtime-tests

oci-runtime-tools: skip the version check for oci-runtime-tests

runtimetest and the ~60 validation/*.go binaries oci-runtime-tests
installs are OCI compliance tests, not user-facing tools, and none
of them has a version flag. Probing one runs the test it implements
instead: CI's generic check reported 58 of 60 missing the version
string and failed the build, and the one it did run tried to read
rootfs-386.tar.gz relative to the probe's working directory rather
than /usr/libexec/oci-runtime-test, so it also failed outright.

Add a test.sh: skip oci-runtime-tests outright, since none of its
binaries can report a version, and keep the generic check for
oci-runtime-tool by replicating it directly now that --version
reports the right string.

Signed-off-by: Daniel Golle <redacted>