Add route support to koinNavGraphViewModel() extension

[SebastianHelzer]

Is your feature request related to a problem? Please describe.
The koinNavGraphViewModel() extension is perfect for scoping ViewModels to nav graphs but when using the nav graph DSL graph ids are inaccessible.

Describe the solution you'd like
It would be nice if the extension function also supports routes. This issue was reported earlier as #1476 and addressed in this PR #1473 but the issue and PR were closed without being merged in.

Describe alternatives you've considered
Currently I use my own variant of the extension function which does support route based navigation. It would however be better if I could just use the koinNavGraphViewModel() extension function.

Target Koin project
koin-androidx-navigation

[SebastianHelzer]

This will be resolved with the merging of #1819