Fix how we set the EOL property for the build

Author: marcpopMSFT

test/Microsoft.NET.Publish.Tests/GivenThatWeWantToPublishASingleFileApp.cs

@@ -747,10 +747,9 @@ public void EnableSingleFile_warns_when_expected_for_not_correctly_multitargeted
             testProject.AdditionalProperties["CheckEolTargetFramework"] = "false"; // Silence warning about targeting EOL TFMs
             var testAsset = _testAssetsManager.CreateTestProject(testProject, identifier: targetFrameworks)
                 .WithProjectChanges(AddTargetFrameworkAliases);
-            testAsset.AdditionalProperties["CheckEolTargetFramework"] = "false"; // Silence warning about targeting EOL TFMs
 
             var buildCommand = new BuildCommand(testAsset);
-            var resultAssertion = buildCommand.Execute("/bl:my.binlog")
+            var resultAssertion = buildCommand.Execute("/bl:my.binlog /p:CheckEolTargetFramework=false")
                 .Should().Pass();
             if (shouldWarn) {
                 // Note: can't check for Strings.EnableSingleFileAnalyzerUnsupported because each line of

test/Microsoft.NET.Publish.Tests/GivenThatWeWantToPublishAnAotApp.cs

@@ -649,10 +649,9 @@ public void IsAotCompatible_warns_when_expected_for_not_correctly_multitarget_li
             testProject.AdditionalProperties["CheckEolTargetFramework"] = "false"; // Silence warning about targeting EOL TFMs
             var testAsset = _testAssetsManager.CreateTestProject(testProject, identifier: targetFrameworks)
                 .WithProjectChanges(AddTargetFrameworkAliases);
-            testAsset.AdditionalProperties["CheckEolTargetFramework"] = "false"; // Silence warning about targeting EOL TFMs
 
             var buildCommand = new BuildCommand(testAsset);
-            var resultAssertion = buildCommand.Execute()
+            var resultAssertion = buildCommand.Execute("/p:CheckEolTargetFramework=false")
                 .Should().Pass();
             if (shouldWarn) {
                 resultAssertion

test/Microsoft.NET.Publish.Tests/GivenThatWeWantToRunILLink.cs

@@ -200,10 +200,8 @@ public void IsTrimmable_warns_when_expected_for_not_correctly_multitargeted_libr
             var testAsset = _testAssetsManager.CreateTestProject(testProject, identifier: targetFrameworks)
                 .WithProjectChanges(AddTargetFrameworkAliases);
 
-            testAsset.AdditionalProperties["CheckEolTargetFramework"] = "false"; // Silence warning about targeting EOL TFMs
-
             var buildCommand = new BuildCommand(testAsset);
-            var resultAssertion = buildCommand.Execute()
+            var resultAssertion = buildCommand.Execute("/p:CheckEolTargetFramework=false")
                 .Should().Pass();
             if (shouldWarn) {
                 resultAssertion