[Discover] Patterns profile default column issues

[davismcphee]

While testing noticed another issue with Patterns profile which we might want to fix separately.

The hardcoded default columns sometimes affect the UI/UX. For example, if I define a query

FROM kibana_sample_data_logs | STATS count = COUNT(*) by Pattern = CATEGORIZE(message)
| sort count DESC

with count instead of Count then the width would not be applied and after saving this Discover session the count column disappears from the screen:

Would be great to make the default columns dynamic to user's query (if possible) or don't use them.

Originally posted by @jughosta in #225571 (review)

[elasticmachine]

Pinging @elastic/kibana-data-discovery (Team:DataDiscovery)

[jughosta]

Thanks!