Use FlowParameter for buildFinish event

Support build scan report for Gradle 8.1

#KT-55740: Fixed
#KT-58251: Fixed

libraries/tools/kotlin-gradle-statistics/src/main/kotlin/org/jetbrains/kotlin/statistics/BuildSessionLogger.kt

@@ -20,7 +20,7 @@ class BuildSessionLogger(
     private val maxProfileFiles: Int = DEFAULT_MAX_PROFILE_FILES,
     private val maxFileSize: Long = DEFAULT_MAX_PROFILE_FILE_SIZE,
     private val maxFileAge: Long = DEFAULT_MAX_FILE_AGE,
-    private val forceValuesValidation: Boolean = false
+    private val forceValuesValidation: Boolean = false,
 ) : IStatisticsValuesConsumer {
 
     companion object {
@@ -131,7 +131,10 @@ class BuildSessionLogger(
     }
 
     @Synchronized
-    fun finishBuildSession(@Suppress("UNUSED_PARAMETER") action: String?, failure: Throwable?) {
+    fun finishBuildSession(
+        @Suppress("UNUSED_PARAMETER") action: String?,
+        buildFailed: Boolean,
+    ) {
         try {
             // nanotime could not be used as build start time in nanotime is unknown. As result, the measured duration
             // could be affected by system clock correction
@@ -142,7 +145,7 @@ class BuildSessionLogger(
                 }
                 report(NumericalMetrics.GRADLE_EXECUTION_DURATION, finishTime - it.projectEvaluatedTime)
                 report(NumericalMetrics.BUILD_FINISH_TIME, finishTime)
-                report(BooleanMetrics.BUILD_FAILED, failure != null)
+                report(BooleanMetrics.BUILD_FAILED, buildFailed)
             }
             buildSession = null
         } finally {