Simplify tllist recipe

[uilianries]

This recipe is header-only and doesn't require any change, so it can be very simple, without dependencies and very fast to be built.

I removed all build requirements because they are not needed here, let's use only cmake for testing because it's expected for every environment.

Avoid using package version range, it's not allowed on Conan Center and creates an unpredictable situation.

Requiring Conan 1.43 is too high, but it's fine as CCI always expects the latest version installed.

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• I've followed the PEP8 style guides for Python code in the recipes.
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• I've tried at least one configuration locally with the
  conan-center hook activated.