refactor: add internal action to handle detection of build backend, uv lockfile, dependency groups usage, ...

Mainly a follow up to the discussion [here](https://github.com/ansys/actions/pull/1427#discussion_r3721496533).

Having everything in a single job would help a lot with maintenance of our actions. This might add a tiny overhead to existing actions because some extra check might be performed but the maintenance would be WAYYYYY easier in the long run. Also, playing with inputs might allow to reduce overhead greatly :)

Start with the discussion in pull request 1427, which motivates consolidating the checks. Define the internal action around build-backend, uv lockfile, and dependency-group detection, then verify that existing actions can use it without changing their behavior or adding unnecessary checks.

Written by the indexing model from the issue text.