EEVEE: Update UI Names

This PR will use "EEVEE (Legacy)" for the legacy EEVEE and renames
"EEVEE Next" to "EEVEE".

When starting Blender EEVEE Legacy will still be the default. We
will change the default to EEVEE when all missing features have been
addressed.

After that we can cleanup idnames and panels etc.

Pull Request: https://projects.blender.org/blender/blender/pulls/114272

source/blender/draw/engines/eevee/eevee_engine.cc

@@ -668,7 +668,7 @@ RenderEngineType DRW_engine_viewport_eevee_type = {
     /*next*/ nullptr,
     /*prev*/ nullptr,
     /*idname*/ EEVEE_ENGINE,
-    /*name*/ N_("EEVEE"),
+    /*name*/ N_("EEVEE (Legacy)"),
     /*flag*/ RE_INTERNAL | RE_USE_PREVIEW | RE_USE_STEREO_VIEWPORT | RE_USE_GPU_CONTEXT,
     /*update*/ nullptr,
     /*render*/ &DRW_render_to_image,

source/blender/draw/engines/eevee_next/eevee_engine.cc

@@ -186,7 +186,7 @@ RenderEngineType DRW_engine_viewport_eevee_next_type = {
     /*next*/ nullptr,
     /*prev*/ nullptr,
     /*idname*/ "BLENDER_EEVEE_NEXT",
-    /*name*/ N_("EEVEE Next"),
+    /*name*/ N_("EEVEE"),
     /*flag*/ RE_INTERNAL | RE_USE_PREVIEW | RE_USE_STEREO_VIEWPORT | RE_USE_GPU_CONTEXT,
     /*update*/ nullptr,
     /*render*/ &DRW_render_to_image,