chore(fv): Refactor fv optimizations

Made a separate folder for formal verification related optimizations.
Also renamed the optimization for inlining calls in fv attributes.

compiler/noirc_evaluator/src/ssa.rs

@@ -261,7 +261,7 @@ pub(crate) fn optimize_into_verus_vir(
     .run_pass(Ssa::fold_constants_using_constraints, "After Constraint Folding:")
     .run_pass(Ssa::dead_instruction_elimination, "After Dead Instruction Elimination:")
     .run_pass(Ssa::array_set_optimization, "After Array Set Optimizations:")
-    .run_pass(Ssa::formal_verifications_optimization, "After Formal Verification Optimizations:")
+    .run_pass(Ssa::inline_calls_in_attributes, "After Inlining Calls in attributes:")
     .finish();
 
     drop(ssa_gen_span_guard);

compiler/noirc_evaluator/src/ssa/opt/formal_verifications.rs → compiler/noirc_evaluator/src/ssa/opt/fv_opts/fv_inline_calls.rs

@@ -13,7 +13,7 @@ struct RightShiftInfo {
 }
 
 impl Ssa {
-    pub(crate) fn formal_verifications_optimization(mut self) -> Self {
+    pub(crate) fn inline_calls_in_attributes(mut self) -> Self {
         // There is a loop bound to avoid infinite run.
         for _ in 0..1000 {
             if !self.has_call_instruction() {

compiler/noirc_evaluator/src/ssa/opt/fv_opts/mod.rs

@@ -0,0 +1,2 @@
+mod fv_inline_calls;
+// mod fix_value_map;

compiler/noirc_evaluator/src/ssa/opt/mod.rs

@@ -21,4 +21,4 @@ mod resolve_is_unconstrained;
 mod runtime_separation;
 mod simplify_cfg;
 mod unrolling;
-mod formal_verifications;
+pub(crate) mod fv_opts;