Enable building Studio (Linux only) as a component of the main MuJoCo build.

And remove the separate, conditional (and hacky) "build_studio" step.

PiperOrigin-RevId: 934375150
Change-Id: I46514d0f33c17bb29625b818cdde3a285fd2c439

python/mujoco/experimental/studio/CMakeLists.txt

@@ -68,3 +68,18 @@ target_include_directories(implot PRIVATE ../dear_imgui)
 set_target_properties(implot PROPERTIES
   LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/../implot"
 )
+
+# Workaround for duplicate symbol error (wp_fractional_scale_manager_v1_interface)
+# when linking both GLFW (via Filament) and SDL2 statically on Linux.
+if(UNIX AND NOT APPLE)
+  set(STUDIO_PY_MODULES
+      parser
+      native_viewer_cc
+      renderer
+      ux
+      sim
+  )
+  foreach(target ${STUDIO_PY_MODULES})
+    target_link_options(${target} PRIVATE "-Wl,--allow-multiple-definition")
+  endforeach()
+endif()