Automated test for scene files with and without python scripts running python incorrectly (#2373)

* Cleared m_scriptFilename between scene files.
This fixes a bug where a Python script file would be run on a scene file
that didn't have a script file set.
Added a general case version to SceneBuilderWorker.cpp, to make it easy
to mark all scene files as dirty.
Automated tests for this will come in a separate pull request.

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

* Work in progress automated tests

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

* Python test done

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

* Sorted jobs work now. This may sort too aggressively, I'll remove the additional sorting after some testing.

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

* Cleaned up test

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

* Fixed stray '

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

* Removed temp code from test

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

* Command line help options for AP
Removed job sorting that wasn't actually sorting jobs

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

* Changed constant variable names to match coding standards

Signed-off-by: stankowi <4838196+AMZN-stankowi@users.noreply.github.com>

Code/Tools/AssetProcessor/native/assetprocessor.h

@@ -244,6 +244,11 @@ namespace AssetProcessor
                 m_jobEntry.m_builderGuid == rhs.m_jobEntry.m_builderGuid);
         }
 
+        static bool DatabaseSourceLexCompare(const JobDetails& left, const JobDetails& right)
+        {
+            return left.m_jobEntry.m_databaseSourceName <= right.m_jobEntry.m_databaseSourceName;
+        }
+
         JobDetails() = default;
     };