tests: Use default equality in test_mutation_diff_with_random_generator
tests: Use default equality in test_mutation_diff_with_random_generator

duarten/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla,duarten/scylla,scylladb/scylla