COG layer GFI display error on Cesium #12433

[rowheat02]

Description

This PR fixes to show cog pixel value like how it is being shown in 2d.

Screen.Recording.2026-05-29.at.16.08.58.mov

Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/geosolutions-it/MapStore2/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x", remove the others)

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

Issue

What is the current behavior?

#12433
For 3d
The GFI opens and the following error appears:
There is no information available for this point

What is the new behavior?

The GFI panel opens and the information is displayed (for 3d also)

Breaking change

Does this PR introduce a breaking change? (check one with "x", remove the other)

• Yes, and I documented them in migration notes
• No

Other useful information

• Since tileLoad takes time, moved as an async task to get the pixel value
• For consistency, getting pixel value for 3d also moved as async task