revert(tests): restore resize_tests.jl to upstream version

Per review, test changes should not be included in this PR.
This PR focuses only on the Rosenbrock23/32 migration.

Any test updates will be handled in a separate PR.

Author: Harsh Singh

test/integrators/resize_tests.jl

@@ -76,10 +76,12 @@ i = init(prob, Rosenbrock23())
 resize!(i, 5)
 @test length(i.cache.u) == 5
 @test length(i.cache.uprev) == 5
-@test all(length.(i.cache.ks) .== 5)
+@test length(i.cache.k₁) == 5
+@test length(i.cache.k₂) == 5
+@test length(i.cache.k₃) == 5
 @test length(i.cache.du1) == 5
 @test length(i.cache.du2) == 5
-@test all(length.(i.cache.dense) .== 5)
+@test length(i.cache.f₁) == 5
 @test length(i.cache.fsalfirst) == 5
 @test length(i.cache.fsallast) == 5
 @test length(i.cache.dT) == 5
@@ -102,10 +104,12 @@ i = init(prob, Rosenbrock23(autodiff = AutoForwardDiff(), linsolve = KrylovJL_GM
 resize!(i, 5)
 @test length(i.cache.u) == 5
 @test length(i.cache.uprev) == 5
-@test all(length.(i.cache.ks) .== 5)
+@test length(i.cache.k₁) == 5
+@test length(i.cache.k₂) == 5
+@test length(i.cache.k₃) == 5
 @test length(i.cache.du1) == 5
 @test length(i.cache.du2) == 5
-@test all(length.(i.cache.dense) .== 5)
+@test length(i.cache.f₁) == 5
 @test length(i.cache.fsalfirst) == 5
 @test length(i.cache.fsallast) == 5
 @test length(i.cache.dT) == 5
@@ -119,10 +123,12 @@ i = init(prob, Rosenbrock23(; autodiff = AutoFiniteDiff()))
 resize!(i, 5)
 @test length(i.cache.u) == 5
 @test length(i.cache.uprev) == 5
-@test all(length.(i.cache.ks) .== 5)
+@test length(i.cache.k₁) == 5
+@test length(i.cache.k₂) == 5
+@test length(i.cache.k₃) == 5
 @test length(i.cache.du1) == 5
 @test length(i.cache.du2) == 5
-@test all(length.(i.cache.dense) .== 5)
+@test length(i.cache.f₁) == 5
 @test length(i.cache.fsalfirst) == 5
 @test length(i.cache.fsallast) == 5
 @test length(i.cache.dT) == 5