test/cql-pytest: remove "xfail" mark from scientific-notation tests that now pass
test/cql-pytest: remove "xfail" mark from scientific-notation tests that now pass

After issue #10100 was fixed, the two tests reproducing it now pass,
so remove their "xfail" marker.

Signed-off-by: Nadav Har'El <625169824b719df98706d88646d0aae6f368ae4d@scylladb.com>
Message-Id: <20220222131809.970592-1-625169824b719df98706d88646d0aae6f368ae4d@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla