Log stream configuration options

[codebrain]

Describe the feature:

We are building dashboards for a customer that make use of the Log Stream component.

Ideally we would like to;

• Define the columns present in each log stream component individually
• Define the ideally the index pattern(s) to search
• We would also like for columns to "hide" if there is no data present in that particular column, perhaps being able to "expand" all hidden columns with a button press.
• Configure column wrapping; wrap, no-wrap, ellipsis - allowing full data to be shown on mouse hover.

Describe a specific use case for the feature:

We are building a dashboard across multiple different integrations, where not all fields are all present in the ECS schema for each integration. The log stream stream presents with quite a few empty columns and the horizontal limitations of screen size create an awkward user experience.

[elasticmachine]

Pinging @elastic/unified-observability (Team:Unified observability)