Enable logging branch SiteExtension

[pakrym]

We are servicing Azure Logger provider and need to rebuild branch site extension.

[dougbu]

To confirm: This PR doesn't need any new packages to be listed in PatchConfig.props?

[pakrym]

Honestly, I'm not sure, site extension build produces a package but it's not our usual product .nupkg and is more similar to shared runtime packages in nature and is done in a separate build step.

What does PatchConfig affect?

[dougbu]

What does PatchConfig affect?

As I understand it, this file affects what's included in the "slim" version of the patch Zip for incremental patch updates as well as the packages we actually ship. @natemcmaster is that correct?

[natemcmaster]

PatchConfig affects all projects which import Directory.Build.props/targets. It is used to determine whether or not to produce a new .nupkg.

Site extension is still special in this branch of the build system. Run the build locally and double check that you get the build artifacts you expect.