console: advanced debug features not working for tenant

When you try to use block profiling, it generates a url like this:

```
https://xxxxxxxx:8081/debug/pprof/ui/block/?node=sql1
```

and you get this in the browser:

```
rpc error: code = InvalidArgument desc = instance ID could not be parsed: strconv.ParseInt: parsing "sql1": invalid syntax
```

Workaround: go directly to /debug/pprof endpoint.

Jira issue: CRDB-15335

Epic CRDB-12100