Number format for tables should not be applied for non-numeric values (grouping keys)

[kirik]

Related to #1108 on version 2.9.0 it still display NaNs when Percents formatter is chosen.

Thank you in advance.

[pulpdrew]

Thanks for raising this issue @kirik. This appears to impact group-by keys with aliases and/or with map accesses, due to the usage of arrayElement(...) breaking the matching logic in #1121.

We can take a look at making that fix more robust.