fix: Add test for argument_specs matching

[SuperQ]

Compare contents of meta/arguments_spec.yml against defaults/main.yml on each role to make sure keys match.

[github-actions]

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This PR has been merged and the docs are now incorporated into main:
https://prometheus-community.github.io/ansible/branch/main

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[gardar]

Nice!

Perhaps we should take it a step further and generate the defaults from the argument_specs automatically?
Like what's being discussed here: ansible/ansible#77664

[SuperQ]

Possibly, we would need to have a way to include example content as comments.

[gardar]

We just need to move the example content into the descriptions of the argument specs, we could then just take the argument spec descriptions and convert those into comments in the defaults.
But perhaps it's time to move the docs/examples out of the defaults?