Clean up changelog fragments and clarify the determinism mode comment

Drop two fragments left over from isaac-sim#7405, which merged: the docker and CLI
changes they described are no longer part of this branch.

Rename the isaaclab_newton fragment to describe the change that is actually
here. The P-ADMM solver-combination fix now comes from develop, so the only
remaining change in that package is the test update for Newton's new drive
class names.

State why the manipulation case asks for run_to_run rather than implying it
matches the cartpole cases, which request the stronger gpu_to_gpu.

Author: hujc7

source/isaaclab/changelog.d/jichuanh-invariants-pull-on-deps-hit.skip

@@ -0,0 +1,3 @@
+Test-only change: the actuator tests now assert Newton's new drive class names
+(``DrivePD``, ``DriveNeuralMLP``, ``DriveNeuralLSTM``). Newton 1.6.0rc1 still exports the
+old ``Controller*`` aliases, so there is no user-visible behavior change.

source/isaaclab/changelog.d/jichuanh-kitless-isaac-sim-symlink.skip

@@ -39,9 +39,9 @@ def setup_environment():
     ("task_name", "deterministic_mode"),
     [
         # Newton defaults to ``wp.DeterministicMode.NOT_GUARANTEED``, under which Warp's atomics may
-        # accumulate in any order, so two runs are not bit-reproducible. Ask for the guarantee this
-        # test asserts, as the Newton cartpole cases below already do. ``deterministic_mode`` is a
-        # Newton setting, so the PhysX-backed task leaves it unset.
+        # accumulate in any order, so two runs are not bit-reproducible. ``run_to_run`` is exactly
+        # the guarantee this test asserts: one device, one process, run twice. ``deterministic_mode``
+        # is a Newton setting, so the PhysX-backed task leaves it unset.
         ("Isaac-Open-Drawer-Franka", "run_to_run"),
         ("IsaacContrib-Lift-Cube-Franka", None),
     ],