Bump Hex Erlang to 25

[TylerWitt]

What are you trying to accomplish?

This is a baby step on the way to Elixir 1.18 (#11295). I've found that the jump of 4 minor versions and a handful of erlang versions is a lot of debugging. I also think that handling the upgrade in smaller steps will lead to a better git history anyways.

Currently we are using Erlang 24 from apt, and there are notes that we should not use ESL for this version of Ubuntu, but times have changed and ESL seems to have caught up. This change re-implements ESL and bumps Erlang to 25.

I think ESL is the best way forward outside of using the RabbitMQ erlang solutions (which I'm fine with doing if desired, I'm just more familiar with ESL).

This also bumps Elixir by a patch version (1.14.4 -> 1.14.5)

The next step in this journey is to bump Elixir to 1.15--this change was primarily to isolate the diff for switching to ESL. The minimum Jammy ESL version ended up being 25.

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.