Perf: Optimize GetNavigationSource(ODataPath)

[habbes]

The GetNavigationSource(ODataPath) is relatively expensive. Part of the cost is due to the fact that we rely on a custom path segment handler to determine the path.

Once we ship an ODL version that support indexing ODataPath, we can rewrite this method using a simple loop that reads the segments from the end until it find the appropriate one to determine the navigation source.

Related:

• Perf: ODataPath operations are costly odata.net#2814
• Perf: Allow index-based random access to segments in ODataPath odata.net#2804
• Add index-based access to ODataPath odata.net#2811