cli: crash with \statement-diag list in demo

[yuzefovich]

If I spin up a demo on e19d98d, and do this:

SELECT crdb_internal.request_statement_bundle('SELECT _', 0::FLOAT, 0::INTERVAL, 0::INTERVAL);
SELECT 1;

so that a single stmt bundle is collected and then try to see the available bundles with \statement-diag list, the CLI crashes:

*
* ERROR: a panic has occurred!
* interface conversion: driver.Value is string, not int64
* (1) attached stack trace
*   -- stack trace:
*   | github.com/cockroachdb/cockroach/pkg/cli/clisqlclient.stmtDiagListBundlesInternal
*   | 	github.com/cockroachdb/cockroach/pkg/cli/clisqlclient/statement_diag.go:64
*   | github.com/cockroachdb/cockroach/pkg/cli/clisqlclient.StmtDiagListBundles
*   | 	github.com/cockroachdb/cockroach/pkg/cli/clisqlclient/statement_diag.go:36
*   | github.com/cockroachdb/cockroach/pkg/cli/clisqlshell.(*cliState).statementDiagList
*   | 	github.com/cockroachdb/cockroach/pkg/cli/clisqlshell/statement_diag.go:80
*   | github.com/cockroachdb/cockroach/pkg/cli/clisqlshell.(*cliState).handleStatementDiag
*   | 	github.com/cockroachdb/cockroach/pkg/cli/clisqlshell/statement_diag.go:40

Jira issue: CRDB-17135