test: separate out the enzyme testing

Author: avik-pal

.github/workflows/Downgrade.yml

@@ -18,6 +18,7 @@ jobs:
         version: ['1']
         group:
           - Core
+          - Enzyme
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2

.github/workflows/Tests.yml

@@ -31,6 +31,7 @@ jobs:
           - "LinearSolveHYPRE"
           - "LinearSolvePardiso"
           - "LinearSolveBandedMatrices"
+          - "Enzyme"
     uses: "SciML/.github/.github/workflows/tests.yml@v1"
     with:
       group: "${{ matrix.group }}"

test/enzyme.jl

@@ -1,7 +1,6 @@
 using Enzyme, ForwardDiff
 using LinearSolve, LinearAlgebra, Test
 using FiniteDiff
-using SafeTestsets
 
 n = 4
 A = rand(n, n);

test/runtests.jl

@@ -15,13 +15,16 @@ if GROUP == "All" || GROUP == "Core"
     @time @safetestset "Non-Square Tests" include("nonsquare.jl")
     @time @safetestset "SparseVector b Tests" include("sparse_vector.jl")
     @time @safetestset "Default Alg Tests" include("default_algs.jl")
-    @time @safetestset "Enzyme Derivative Rules" include("enzyme.jl")
     @time @safetestset "Adjoint Sensitivity" include("adjoint.jl")
     @time @safetestset "Traits" include("traits.jl")
     @time @safetestset "BandedMatrices" include("banded.jl")
     @time @safetestset "Static Arrays" include("static_arrays.jl")
 end
 
+if GROUP == "All" || GROUP == "Enzyme"
+    @time @safetestset "Enzyme Derivative Rules" include("enzyme.jl")
+end
+
 if GROUP == "LinearSolveCUDA"
     Pkg.activate("gpu")
     Pkg.develop(PackageSpec(path = dirname(@__DIR__)))