chore(serialization): Use msgpack-compact by default

[aakoshh]

Description

Problem

Resolves the desire from the Barretenberg team to make msgpack-compact the default format.

Summary

Changes the default circuit serialization format to msgpack-compact, which results in structs being serialized as arrays, without field names.

Additional Context

• Relies on feat: C++ codegen to support the msgpack-compact serialisation format #10878 being available in Barretenberg to read the format
• Adopts the more efficient map serialisation for enums from feat: remove bincode support, use msgpack-compact only AztecProtocol/aztec-packages#19047
• See feat: MessagePack serialisation for circuits #7690 for the potential reduction in serialised circuit size
• See the unit tests for backwards compatibility expectations:

  noir/acvm-repo/acir/src/serialization.rs

  Lines 257 to 266 in f51cad2

  	/// Test that the `msgpack_serialize(compact=true)` is backwards compatible for a subset of the cases:
  	/// * removal of an enum variant (e.g. opcode no longer in use)
  	/// * struct fields renamed: accepted because position based
  	/// * adding unused enum variants
  	///
  	/// And rejects cases which could lead to unintended behavior:
  	/// * struct fields added: rejected because the number of fields change
  	/// * struct fields reordered: rejected because fields are position based
  	#[test]
  	fn msgpack_serialize_compact_backwards_compatibility() {

User Documentation

Check one:

• No user documentation needed.
• Changes in docs/ included in this PR.
• [For Experimental Features] Changes in docs/ to be submitted in a separate PR.

PR Checklist

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings.

[github-actions]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark 'Execution Time'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.20.

Benchmark suite	Current: fcaf30f	Previous: f51cad2	Ratio
rollup-block-root-single-tx	0.003 s	0.002 s	1.50

This comment was automatically generated by workflow using github-action-benchmark.

CC: @TomAFrench

[github-actions]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark 'Test Suite Duration'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.20.

Benchmark suite	Current: cb24311	Previous: 99bb8b5	Ratio
test_report_zkpassport_noir-ecdsa_	3 s	2 s	1.50

This comment was automatically generated by workflow using github-action-benchmark.

CC: @TomAFrench