nir: move GL specific passes to src/compiler/glsl

With this we should have no passes in src/compiler/nir with any
dependencies on headers from core GL Mesa.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>

src/compiler/nir/meson.build

@@ -106,7 +106,6 @@ files_libnir = files(
   'nir_lower_64bit_packing.c',
   'nir_lower_alu_to_scalar.c',
   'nir_lower_alpha_test.c',
-  'nir_lower_atomics.c',
   'nir_lower_atomics_to_ssbo.c',
   'nir_lower_bitmap.c',
   'nir_lower_clamp_color_outputs.c',
@@ -132,8 +131,6 @@ files_libnir = files(
   'nir_lower_phis_to_scalar.c',
   'nir_lower_regs_to_ssa.c',
   'nir_lower_returns.c',
-  'nir_lower_samplers.c',
-  'nir_lower_samplers_as_deref.c',
   'nir_lower_subgroups.c',
   'nir_lower_system_values.c',
   'nir_lower_tex.c',