Update Catch2 from 2.10.1 to 2.13.9

[graemenail]

Description

This PR updates Marian to use the most recent version of Catch2 in its v2 series of releases.

I encountered a compilation issue on a Ubuntu 22.04 machine with gcc-11. The issue was from a glibc change (between 2.31 -- 2.35) in which a system call can no longer be constexpr. See the related issue for more details.

This is already patched in newer Catch2 versions.

Related: https://github.com/catchorg/Catch2/issues/2178, #958

List of changes:

• Update Catch2 header

Added dependencies: none

How to test

• Changes compile on impacted system, and non-impacted systems.
• Unit tests run and pass.
• GitHub actions (including unit tests) pass.

Checklist

• [x] I have tested the code manually
• [ ] I have run regression tests
• [x] I have read and followed CONTRIBUTING.md
• [x] I have updated CHANGELOG.md