* Add `awx_plugins.interfaces` runtime dependency
* Use `awx_plugins.interfaces` for runtime detection
The original function name was `server_product_name()` but it didn't
really represent what it did. So it was renamed into
`detect_server_product_name()` in an attempt of disambiguation.
* Use `awx_plugins.interfaces` to map container path
The original function `to_container_path` has been renamed into
`get_incontainer_path()` to represent what it does better and make
the imports more obvious.
* Add license file for awx_plugins.interfaces
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Co-authored-by: Hao Liu <44379968+TheRealHaoLiu@users.noreply.github.com>