radeonsi: raise number of samplers per shader to 32
radeonsi: raise number of samplers per shader to 32

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94835
Reviewed-by: Marek Olšák <8c7344a1abdb103e79ecfd488098373070c3c70e@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler