MSBuild: parent template is not rebuilt when child (module) template changes

**Bicep version**
0.4.1124

**Describe the bug**
If you have two templates `parent.bicep` and `child.bicep` where `child.bicep` is included as a module from `parent.bicep`, rebuilding templates with `dotnet build` will only regenerate `child.json`, not `parent.json`

**Additional context**
I believe this was caused by #5253, FYI @stan-sz

Reproduce the issue with parent.bicep including child.bicep, then run dotnet build and observe whether both JSON templates are regenerated. Start by tracing the MSBuild handling of module dependencies; done means changing child.bicep causes both child.json and parent.json to regenerate.

Written by the indexing model from the issue text.