Templates restricted (#6498)

* Templates/Restricted upgrade/fixes:
Fixed template storage format: templates now only store true relative paths and no longer save "origin" paths and "optional" has been removed, it was never used.
Upgraded all templates to new standard
Template system now correctly handles child objects: Child objects no longer have to specify restricted they inherit from parent
Restricted now operates at the object level and makes no assumptions about parent
Restricted templates can now be combined and seperated on creation
ly_get_list_relative_filename has been deprecated for o3de_pal_dir
All Gems/Projects/Templates updated to use new code

Signed-off-by: byrcolin <byrcolin@amazon.com>

Code/Tools/ProjectManager/Source/PythonBindings.cpp

@@ -1221,7 +1221,7 @@ namespace O3DE::ProjectManager
         auto result = ExecuteWithLockErrorHandling(
             [&]
             {
-                for (auto repoUri : m_manifest.attr("get_repos")())
+                for (auto repoUri : m_manifest.attr("get_manifest_repos")())
                 {
                     gemRepos.push_back(GetGemRepoInfo(repoUri));
                 }