Resolves#33557
The tems.name column uses utf8mb4_unicode_ci, so names like "ABC" and
"abc" compare as equal at the database level. Before this change name
collisions were handled in different ways in the UI and in GitOps.
The changes introduced here, consolidates the logic used for detecting
name collisions in all code path. All conflicts return 409 with the
canonical copy "Fleet names must differ by at least one non-special
character (case-insensitive).
Juan Fernandez
1539c6b094