Add SkipIfNotAdminAttribute to StartsWithDotnetInstallLocation (#6718)

Author: pakrym

src/Servers/IIS/IIS/test/Common.FunctionalTests/Inprocess/StartupTests.cs

@@ -110,6 +110,7 @@ public async Task StartsWithDotnetOnThePath(string path)
         [ConditionalTheory]
         [InlineData(RuntimeArchitecture.x64)]
         [InlineData(RuntimeArchitecture.x86)]
+        [SkipIfNotAdmin]
         [RequiresNewShim]
         [RequiresIIS(IISCapability.PoolEnvironmentVariables)]
         public async Task StartsWithDotnetInstallLocation(RuntimeArchitecture runtimeArchitecture)