[3.0] FTBFS without --disable-libplacebo

Without --disable-libplacebo v3.0 builds fail with:

../../modules/video_output/opengl/vout_helper.c: In function 'opengl_init_program':
ERROR   : ../../modules/video_output/opengl/vout_helper.c:637: 14:  'struct pl_gpu_dummy_params' has no member named 'caps'
  637 |             .caps = PL_GPU_CAP_INPUT_VARIABLES,

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information