sql: internal error invalid data type

Repro:
```
CREATE SEQUENCE sequence_test4 INCREMENT BY -1;
SELECT * FROM pg_sequence_parameters('sequence_test4'::regclass);
```

Stacktrace:
```
ERROR: internal error: invalid datum type given: INT8, expected RECORD
SQLSTATE: XX000
DETAIL: stack trace:
github.com/cockroachdb/cockroach/pkg/sql/rowenc/encoded_datum.go:195: DatumToEncDatum()
github.com/cockroachdb/cockroach/pkg/sql/rowexec/project_set.go:334: toEncDatum()
github.com/cockroachdb/cockroach/pkg/sql/rowexec/project_set.go:241: nextGeneratorValues()
github.com/cockroachdb/cockroach/pkg/sql/rowexec/project_set.go:313: Next()
github.com/cockroachdb/cockroach/pkg/sql/colexec/columnarizer.go:239: Next()
github.com/cockroachdb/cockroach/pkg/sql/colflow/stats.go:118: next()
github.com/cockroachdb/cockroach/pkg/sql/colexecerror/error.go:92: CatchVectorizedRuntimeError()
github.com/cockroachdb/cockroach/pkg/sql/colflow/stats.go:126: Next()
github.com/cockroachdb/cockroach/pkg/sql/colflow/flow_coordinator.go:250: nextAdapter()
github.com/cockroachdb/cockroach/pkg/sql/colexecerror/error.go:92: CatchVectorizedRuntimeError()
github.com/cockroachdb/cockroach/pkg/sql/colflow/flow_coordinator.go:254: next()
github.com/cockroachdb/cockroach/pkg/sql/colflow/flow_coordinator.go:286: Run()
github.com/cockroachdb/cockroach/pkg/sql/colflow/vectorized_flow.go:320: Run()
github.com/cockroachdb/cockroach/pkg/sql/distsql_running.go:910: Run()
github.com/cockroachdb/cockroach/pkg/sql/distsql_running.go:1957: PlanAndRun()
github.com/cockroachdb/cockroach/pkg/sql/distsql_running.go:1672: func3()
github.com/cockroachdb/cockroach/pkg/sql/distsql_running.go:1675: PlanAndRunAll()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor_exec.go:2302: execWithDistSQLEngine()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor_exec.go:1861: dispatchToExecutionEngine()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor_exec.go:1092: execStmtInOpenState()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor_exec.go:145: func1()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor_exec.go:3277: execWithProfiling()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor_exec.go:144: execStmt()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor.go:2227: func1()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor.go:2232: execCmd()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor.go:2149: run()
github.com/cockroachdb/cockroach/pkg/sql/conn_executor.go:952: ServeConn()
github.com/cockroachdb/cockroach/pkg/sql/pgwire/conn.go:247: processCommands()
github.com/cockroachdb/cockroach/pkg/sql/pgwire/server.go:1001: func3()
src/runtime/asm_amd64.s:1650: goexit()

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```

postgres does not error

Found in pg_regress sequence

Jira issue: CRDB-33714