Feat: Prevent user with non UTF-8 encoding to create geo tree

[CarolineDenis]

Fuxes #7842

Checklist

• Self-review the PR after opening it to make sure the changes look good and
  self-explanatory (or properly documented)
• Add relevant issue to release milestone
• Add pr to documentation list

Testing instructions

• Open the tree viewer with a db that do not use UTF-8 encoding
• Click on create new tree (+)
• Verify that the Geo tree cannot be clicked and that the warning "'This tree data cannot be imported in your database because it contains UTF-8 characters and this database uses {encoding:string}'" is displayed as well as a link to our documentation on how to fix it. (Doc to be created)

[emenslin]

• Verify that the Geo tree cannot be clicked and that the warning "'This tree data cannot be imported in your database because it contains UTF-8 characters and this database uses {encoding:string}'" is displayed as well as a link to our documentation on how to fix it. (Doc to be created)

The geo tree warning works when adding a tree to an existing collection and when creating a new discipline in system config, but is not caught properly on initial setup. After selecting the geology discipline, if you try to pre-load the geology tree you get an insufficient privileges error instead of the encoding warning.

03-26_08.22.mp4

[emenslin]

• Verify that the Geo tree cannot be clicked and that the warning "'This tree data cannot be imported in your database because it contains UTF-8 characters and this database uses {encoding:string}'" is displayed as well as a link to our documentation on how to fix it. (Doc to be created)

Looks good, my previous issue was fixed

[Iwantexpresso]

• Verify that the Geo tree cannot be clicked and that the warning "'This tree data cannot be imported in your database because it contains UTF-8 characters and this database uses {encoding:string}'" is displayed as well as a link to our documentation on how to fix it. (Doc to be created)

I went to double check the issue borough up by elizabeth

looks great!