chore(ci): Remove mac runner

[vezenovm]

Description

The Mac runner in this PR #1728 fails with a pointer being freed was not allocated error coming from barretenberg. However, all tests pass on my local intel Mac and other's ARM Mac laptops.

We also have moved to just performing execution in the prove_and_verify tests w/ barretenberg handling proving and verification. The error is still happening after the move execution, thus there is most likely some internal bug w/ barretenberg on the Mac runner.

This is blocking slices which is blocking a lot of other work by others, so we are going to remove the Mac runner and create an issue to barretenberg to handle running Noir tests on the different architectures.

Problem*

Resolves

Summary*

Documentation

• This PR requires documentation updates when merged.

  • I will submit a noir-lang/docs PR.
  • I will request for and support Dev Rel's help in documenting this PR.

Additional Context

PR Checklist*

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