Use awx-plugins-shared code from awx_plugins.interfaces (#15566)

* 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

---------

Co-authored-by: Hao Liu <44379968+TheRealHaoLiu@users.noreply.github.com>

awx/ui/urls.py

@@ -2,7 +2,8 @@ from django.urls import re_path
 from django.utils.translation import gettext_lazy as _
 from django.views.generic.base import TemplateView
 
-from awx.main.utils.licensing import server_product_name
+# Shared code for the AWX platform
+from awx_plugins.interfaces._temporary_private_licensing_api import detect_server_product_name
 
 
 class IndexView(TemplateView):
@@ -14,7 +15,7 @@ class MigrationsNotran(TemplateView):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        product_name = server_product_name()
+        product_name = detect_server_product_name()
         context['title'] = _('%s Upgrading' % product_name)
         context['image_alt'] = _('Logo')
         context['aria_spinner'] = _('Loading')