RHI: Remove无效的动态状态方法 - SetDepthStencilState/SetBlendState

重构原因：
- D3D12 PSO是不可变的，SetDepthStencilState/SetBlendState调用原本就是空实现(TODO)
- 这些方法在D3D12中完全无效，是死代码

移除的方法：
- SetDepthStencilState(const DepthStencilState&) - D3D12空实现，OpenGL直接调用GL函数
- SetBlendState(const BlendState&) - D3D12只设置BlendFactor其他忽略，OpenGL直接调用GL函数

保留的真正动态状态：
- SetViewport/SetViewports
- SetScissorRect/SetScissorRects
- SetStencilRef (D3D12动态状态)
- SetBlendFactor (D3D12动态状态)

注：PrimitiveTopology保留在CommandList，因为D3D12允许动态改变topology type

测试状态：150个RHI单元测试全部通过，8个集成测试全部通过

engine/src/RHI/OpenGL/OpenGLCommandList.cpp

@@ -813,58 +813,10 @@ void OpenGLCommandList::SetPrimitiveTopology(PrimitiveTopology topology) {
     m_primitiveType = ToGLPrimitiveTopology(topology);
 }
 
-void OpenGLCommandList::SetDepthStencilState(const DepthStencilState& state) {
-    if (state.depthEnable) {
-        glEnable(GL_DEPTH_TEST);
-        glDepthFunc(ToGLComparisonFunc(state.depthFunc));
-        glDepthMask(state.depthWriteMask ? GL_TRUE : GL_FALSE);
-    } else {
-        glDisable(GL_DEPTH_TEST);
-    }
-
-    if (state.stencilEnable) {
-        glEnable(GL_STENCIL_TEST);
-        glStencilMask(state.stencilWriteMask);
-        glStencilFunc(ToGLComparisonFunc(state.frontFace.stencilFunc), 0, state.stencilReadMask);
-        glStencilOp(
-            ToGLStencilOp(state.frontFace.stencilFailOp),
-            ToGLStencilOp(state.frontFace.stencilDepthFailOp),
-            ToGLStencilOp(state.frontFace.stencilPassOp)
-        );
-    } else {
-        glDisable(GL_STENCIL_TEST);
-    }
-}
-
 void OpenGLCommandList::SetStencilRef(uint8_t ref) {
     glStencilFunc(GL_FRONT_AND_BACK, ref, 0xFF);
 }
 
-void OpenGLCommandList::SetBlendState(const BlendState& state) {
-    if (state.alphaToCoverageEnable) {
-        glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE);
-    } else {
-        glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);
-    }
-
-    const auto& rt = state.renderTargets[0];
-    if (rt.blendEnable) {
-        glEnable(GL_BLEND);
-        glBlendFuncSeparate(
-            ToGLBlendFactor(rt.srcBlend),
-            ToGLBlendFactor(rt.dstBlend),
-            ToGLBlendFactor(rt.srcBlendAlpha),
-            ToGLBlendFactor(rt.dstBlendAlpha)
-        );
-        glBlendEquationSeparate(
-            ToGLBlendOp(rt.blendOp),
-            ToGLBlendOp(rt.blendOpAlpha)
-        );
-    } else {
-        glDisable(GL_BLEND);
-    }
-}
-
 void OpenGLCommandList::SetBlendFactor(const float factor[4]) {
     glBlendColor(factor[0], factor[1], factor[2], factor[3]);
 }