ci: enable AlterDoesntUpdateColumnCount test

It is now enabled in favor of AlterProperlyUpdatesColumnCount.

From now on, the metadata in `CassResultData` is consistent,
and the behaviour is that metadata is not updated after altering the table.

Original cpp-driver expects this behaviour for CQL v4 and less:
 * Verify that the column count of a bound statement's result metadata doesn't
 * change for older protocol versions (v4 and less) when a table's schema is altered.

Author: muzarski

Makefile

@@ -26,7 +26,6 @@ SCYLLA_TEST_FILTER := $(subst ${SPACE},${EMPTY},ClusterTests.*\
 :HeartbeatTests.Integration_Cassandra_HeartbeatFailed\
 :ExecutionProfileTest.InvalidName\
 :*NoCompactEnabledConnection\
-:PreparedMetadataTests.Integration_Cassandra_AlterDoesntUpdateColumnCount\
 :PreparedMetadataTests.Integration_Cassandra_AlterProperlyUpdatesColumnCount\
 :UseKeyspaceCaseSensitiveTests.Integration_Cassandra_ConnectWithKeyspace)
 endif
@@ -57,7 +56,6 @@ CASSANDRA_TEST_FILTER := $(subst ${SPACE},${EMPTY},ClusterTests.*\
 :SslTests.Integration_Cassandra_ReconnectAfterClusterCrashAndRestart\
 :ExecutionProfileTest.InvalidName\
 :*NoCompactEnabledConnection\
-:PreparedMetadataTests.Integration_Cassandra_AlterDoesntUpdateColumnCount\
 :PreparedMetadataTests.Integration_Cassandra_AlterProperlyUpdatesColumnCount\
 :UseKeyspaceCaseSensitiveTests.Integration_Cassandra_ConnectWithKeyspace)
 endif