Fix uniform buffer being created every frame when halfsize mismatches #65738
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When SSAO and SSIL aren't both set to full size or half size we were creating a new uniform buffer every frame.
The bug is fixed by the line
ss_effects.used_mips_last_frame = use_mips;but we were also missing proper de-allocation of this uniform buffer. In most cases the uniform buffer is destroyed when it should due to dependencies but in theory it would be possible a new buffer is created when settings change while the old buffer remained.Fixes #63202