[Maps] Indicate in the UI if the zoom level is restricted due to a missing or invalid license

[kindsun]

Describe the feature:

Following up on #59014, currently there's no indication if the Maps App is leveraging the full number of available EMS Vector Tile Layers vs. only up to zoom level 10 as is the case in OSS. Since they are "vector tiles", the map continues to allow zooming in closer than zoom level 10, there are just no further details added. This issue can go relatively unnoticed until a user zooms in close enough to notice a lack of detail. There should be some sort of indication, possibly on the Legend/Layer TOC, letting the user know that the number of zoom levels has been limited due to an invalid, missing or insufficient license.

An added benefit would be increased testability of license-validated map requests as it would be easier to functionally determine if client side license injection and passing through to requests is working as expected.

Describe a specific use case for the feature:

• A user changes their license or it expires and this affects previously created Maps
• Changes to the Maps plugin or further upstream impair Maps' injection into tile fetch requests and the license isn't passed as expected.

[elasticmachine]

Pinging @elastic/kibana-gis (Team:Geo)

[nreese]

Closing, zoom level license checks have been removed