Removal & image changes

[Red-Banana-Official]

Description

Removal of the EOL dotnet 7 image, added dotnet 9 and 10. Dotnet 10 is needed for the four latest pre-releases and the foreseeable future.

Thanks to @danspire for informing me

Checklist for all submissions

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you tested and reviewed your changes with confidence that everything works?
• Did you branch your changes and PR from that branch and not from your master branch?
  • If not, why?
• You verify that the start command applied does not use a shell script
  • If some script is needed then it is part of a current yolk or a PR to add one
• The egg was exported from the panel