DI: Register MVC/WebApi Controllers using TryAddScoped.

[dimarobert]

Fixes #3543

Summary

This is a quick fix for the assigned issue.
This will allow vendors to add/replace controller registrations with their own.
The DefaultControllerFactory is also added to the ServiceCollection using the TryAddSingleton for the same reasons.

Fix AddWebApiControllers typo for AddMvcControllers.

[bdukes]

This looks fine to me, thanks @dimarobert!

[dimarobert]

@bdukes I see that this is part of the 9.5.0 milestone, but what do you think are the chances that it will get merged by then?

[bdukes]

@valadas @ahoefling @mitchelsellers @donker any opinions about getting this change in 9.5.0? I believe this is blocking DNN Sharp modules from working on 9.5.0.

[valadas]

I have no objection merging this in 9.5.0 providing we redo some tests on MVC and SPA modules, but I am no expert in the DI area, you those who know more than me agree, I have no issue retargetting to 9.5.0 personally... Can anyone test DnnSharp modules with this change?

[dimarobert]

I have no objection merging this in 9.5.0 providing we redo some tests on MVC and SPA modules, but I am no expert in the DI area, you those who know more than me agree, I have no issue retargetting to 9.5.0 personally... Can anyone test DnnSharp modules with this change?

We'll have new builds in the next couple of days that should work with 9.5.0. With this PR it should be easier for us to maintain both DNN versions (pre 940 and 950+) without separate install packages for our products.

[bogdan-litescu]

Please let us know if this can be merged in DNN 9.5 Thanks!

[valadas]

Since 9.5.0 was code frozen for about 2 weeks and would get officially released like tomorrow, this pr would not have not went through the testing team. My vote would be to release 9.5.0 as it is ASAP and do a quick 9.5.1 Rc1 with this and other bug fixes that are ready this week with just a 1 week RC stage... Opinions?

[mitchelsellers]

LGTM. I agree with Valadas as this does require a complete test cycle. Including performance

[bdukes]

Thanks @dimarobert for the contribution, unfortunately we dropped the ball getting this reviewed for 9.5.0, but this will be included in 9.5.1 (which we're planning to fast-track, RC should be released soon).