chore: replace env-logger with tracing (#3878)

# Description

## Problem\*

While env-logger concerns itself with logging, tracing is drop in
replacement to support logging case but also provides more features for
profiling.

## Summary\*



## Additional Context



## Documentation\*

Check one:
- [x] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[Exceptional Case]** Documentation to be submitted in a separate
PR.

# PR Checklist\*

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

---------

Co-authored-by: Tom French <tom@tomfren.ch>
Co-authored-by: Tom French <15848336+TomAFrench@users.noreply.github.com>

Cargo.toml

@@ -121,10 +121,11 @@ const_format = "0.2.30"
 num-bigint = "0.4"
 num-traits = "0.2"
 similar-asserts = "1.5.0"
-log = "0.4.17"
 tempfile = "3.6.0"
 
 tracing = "0.1.40"
+tracing-web = "0.1.3"
+tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
 
 [profile.dev]
 # This is required to be able to run `cargo test` in acvm_js due to the `locals exceeds maximum` error.

acvm-repo/acvm/Cargo.toml

@@ -16,7 +16,7 @@ repository.workspace = true
 num-bigint.workspace = true
 num-traits.workspace = true
 thiserror.workspace = true
-log.workspace = true
+tracing.workspace = true
 
 acir.workspace = true
 brillig_vm.workspace = true

acvm-repo/acvm/src/compiler/optimizers/mod.rs

@@ -23,9 +23,8 @@ pub fn optimize(acir: Circuit) -> (Circuit, AcirTransformationMap) {
 }
 
 /// Applies [`ProofSystemCompiler`][crate::ProofSystemCompiler] independent optimizations to a [`Circuit`].
+#[tracing::instrument(level = "trace", name = "optimize_acir" skip(acir))]
 pub(super) fn optimize_internal(acir: Circuit) -> (Circuit, Vec<usize>) {
-    log::trace!("Start circuit optimization");
-
     // General optimizer pass
     let opcodes: Vec<Opcode> = acir
         .opcodes
@@ -54,7 +53,5 @@ pub(super) fn optimize_internal(acir: Circuit) -> (Circuit, Vec<usize>) {
     let (acir, acir_opcode_positions) =
         range_optimizer.replace_redundant_ranges(acir_opcode_positions);
 
-    log::trace!("Finish circuit optimization");
-
     (acir, acir_opcode_positions)
 }