Run :kotlin-gradle-plugin:validateTaskProperties on every install

Previously `validateTaskProperties` was run with tests
(`test` task depends on `validateTaskProperties` task).
Tests run with `--continue` argument on TeamCity,
so the validation was not failing remote-run builds.
To fix this, make `install` depend on `validateTaskProperties`.

libraries/tools/kotlin-gradle-plugin/build.gradle.kts

@@ -131,6 +131,10 @@ tasks {
         failOnWarning = true
     }
 
+    named<Upload>("install") {
+        dependsOn(named("validateTaskProperties"))
+    }
+
     named<DokkaTask>("dokka") {
         outputFormat = "markdown"
         includes = listOf("$projectDir/Module.md")