Drop modification stamps for gradle scripts after project import

^KT-36763 Fixed

idea/idea-gradle/src/org/jetbrains/kotlin/idea/scripting/gradle/GradleScriptInputsWatcher.kt

@@ -49,6 +49,10 @@ class GradleScriptInputsWatcher(val project: Project) : PersistentStateComponent
         storage.fileChanged(filePath, ts)
     }
 
+    fun clearState() {
+        storage = Storage()
+    }
+
     @TestOnly
     fun clearAndRefillState() {
         loadState(project.service<GradleScriptInputsWatcher>().state)

idea/idea-gradle/src/org/jetbrains/kotlin/idea/scripting/gradle/importing/KotlinDslScriptModelDataService.kt

@@ -25,6 +25,7 @@ import com.intellij.pom.Navigatable
 import org.jetbrains.kotlin.idea.core.script.ScriptConfigurationManager
 import org.jetbrains.kotlin.idea.core.script.configuration.cache.CachedConfigurationInputs
 import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationSnapshot
+import org.jetbrains.kotlin.idea.scripting.gradle.GradleScriptInputsWatcher
 import org.jetbrains.kotlin.idea.scripting.gradle.getGradleScriptInputsStamp
 import org.jetbrains.kotlin.idea.scripting.gradle.saveGradleProjectRootsAfterImport
 import org.jetbrains.kotlin.scripting.definitions.findScriptDefinition
@@ -106,6 +107,7 @@ class KotlinDslScriptModelDataService : AbstractProjectDataService<ProjectData,
         }
 
         project.service<ScriptConfigurationManager>().saveCompilationConfigurationAfterImport(scriptConfigurations)
+        project.service<GradleScriptInputsWatcher>().clearState()
     }
 
     private fun addBuildScriptDiagnosticMessage(