chore: add brillig_call submodule

compiler/noirc_evaluator/src/brillig/brillig_gen.rs

@@ -1,11 +1,10 @@
 //! The code generation logic for converting [crate::ssa] objects into their respective [Brillig] artifacts.  
-pub(crate) mod brillig_black_box;
 pub(crate) mod brillig_block;
 pub(crate) mod brillig_block_variables;
+mod brillig_call;
 pub(crate) mod brillig_fn;
 pub(crate) mod brillig_globals;
 mod brillig_instructions;
-pub(crate) mod brillig_slice_ops;
 pub(crate) mod constant_allocation;
 mod variable_liveness;
 

compiler/noirc_evaluator/src/brillig/brillig_gen/brillig_slice_ops.rs → compiler/noirc_evaluator/src/brillig/brillig_gen/brillig_call/brillig_slice_ops.rs

@@ -7,7 +7,7 @@ use crate::brillig::brillig_ir::{
     registers::RegisterAllocator,
 };
 
-use super::brillig_block::BrilligBlock;
+use super::super::brillig_block::BrilligBlock;
 
 impl<Registers: RegisterAllocator> BrilligBlock<'_, Registers> {
     fn write_variables(&mut self, write_pointer: MemoryAddress, variables: &[BrilligVariable]) {