Only run targets when necessary and no earlier

When we add items/propeties that need to be visible to the generators, we only really need to run before the editorconfig is emitted, and no earlier. This happens right before compilation, so it's a safe late-stage target to depend on.

We cannot run later since that would mean outdated info to the generator, but this should avoid early-run issues such as devlooped/GitInfo#260.

Author: kzu

src/ThisAssembly.Constants/ThisAssembly.Constants.targets

@@ -41,7 +41,7 @@
   </Target>
 
   <Target Name="_InjectConstantAdditionalFiles"
-          BeforeTargets="PrepareForBuild;CompileDesignTime;GenerateMSBuildEditorConfigFileShouldRun"
+          BeforeTargets="GenerateMSBuildEditorConfigFileShouldRun"
           DependsOnTargets="PrepareResourceNames;PrepareConstants">
     <ItemGroup>
       <AdditionalFiles Include="@(Constant)" SourceItemType="Constant" />

src/ThisAssembly.Project/ThisAssembly.Project.targets

@@ -13,7 +13,7 @@
   </PropertyGroup>
 
   <Target Name="InjectThisAssemblyProject" DependsOnTargets="$(InjectThisAssemblyProjectDependsOn)" 
-          BeforeTargets="PrepareForBuild;CompileDesignTime;GenerateMSBuildEditorConfigFileShouldRun">
+          BeforeTargets="GenerateMSBuildEditorConfigFileShouldRun">
     <ItemGroup>
       <ProjectPropertyDistinct Include="@(ProjectProperty -> Distinct())" />
     </ItemGroup>

src/ThisAssembly.Resources/ThisAssembly.Resources.targets

@@ -25,7 +25,7 @@
   </ItemDefinitionGroup>
 
   <Target Name="_InjectResourcesAdditionalFiles"
-          BeforeTargets="PrepareForBuild;CompileDesignTime;GenerateMSBuildEditorConfigFileShouldRun"
+          BeforeTargets="GenerateMSBuildEditorConfigFileShouldRun"
           DependsOnTargets="PrepareResourceNames">
     <ItemGroup>
       <EmbeddedResource Condition="!$([System.IO.Path]::IsPathRooted('%(RelativeDir)')) OR '%(Link)' != ''">

src/ThisAssembly.Strings/ThisAssembly.Strings.targets

@@ -7,7 +7,7 @@
   </ItemGroup>
 
   <Target Name="_InjectResxAdditionalFiles"
-          BeforeTargets="PrepareForBuild;CompileDesignTime;GenerateMSBuildEditorConfigFileShouldRun"
+          BeforeTargets="GenerateMSBuildEditorConfigFileShouldRun"
           DependsOnTargets="PrepareResourceNames">
     <ItemGroup>
       <ResxCode Include="@(EmbeddedResource)"