test: activate Enzyme tests on Julia 1.12

Author: gdalle

.github/workflows/Test.yml

@@ -125,10 +125,6 @@ jobs:
             version: '1.12'
           - version: '1.11'
             group: ChainRules
-          - version: '1.12'
-            group: Enzyme
-          - version: '1.12'
-            group: DifferentiateWith
     env:
       JULIA_DI_TEST_TYPE: 'Back'
       JULIA_DI_TEST_GROUP: ${{ matrix.group }}