Can query wmts background layers

Description

For #329 Can query background layers with QueryLayer metadata.

Job done

Query also background layers, not only layers in layertree.

Know issue:

It's working.

But I think we have the same issue with layertree's WMTS: I don't know how to determine if we should use GetFeatureInfo or getFeature requests. Currently WMTS with queryLayers metadata always do GetFeatureInfo request. In the #329 example, we should do a GetFeature I think.

(Do be sure we do GetFeatureInfo, I remove manually the wfsUrl here: https://gitlab.com/geogirafe/gg-viewer/-/blob/main/src/components/map/tools/wmtsmanager.ts?ref_type=heads#L157)

IMO we should open a new dedicated issue to determine and debug GetFeature VS getFeatureInfo

Definition of Done

For the Developer:

• Code compiles and conforms to defined coding standards (eslint, tsc, prettier).
• If necessary (at the developer's discretion), unit tests have been added for critical parts.
• All unittests run without error.
• Sonar-Scan returns no new issues or security hotspots.
• Documentation has been updated where necessary (see documentation repository).
• Merge-Request contains a few explanations of what was done.
• A Reviewer has been assigned to the Merge-Request.

For the Reviewer:

• New code was reviewed.
• If comments could be added on unclear code, the developer has been informed.
• If unitests could be added in certain places, the developer has been informed.
• Merge-Request was merged on main branch.
• All pipelines work.
• The changes were tested on demo environment.
• Application performance has not been degraded by the modifications.

Related to #329