[Obs ai assistant][ESQL] Visualize only with ES|QL, no formulas

[stratoula]

Summary

• Takes under consideration the user's preference (chart type they prefer)
  • When Lens sends the suggestions for the specific ES|QL query, if the chart type is returned, it prioritizes this to the user.
• Removes the lens function
• Either displays only the query or visualizes it

Here it produces a tagcloud

In a more generic query it visualizes with a table of the first 5 columns. The users can edit the table in the inline editing and select the columns that make sense to them (or prompt to keep specific columns)