Thread.getId is deprecated (#16142)

Build under JDK19.

Author: odersky

compiler/src/dotty/tools/dotc/profile/Profiler.scala

@@ -103,6 +103,7 @@ private [profile] class RealProfiler(reporter : ProfileReporter)(using Context)
 
   private val mainThread = Thread.currentThread()
 
+  @nowarn("cat=deprecation")
   private[profile] def snapThread(idleTimeNanos: Long): ProfileSnap = {
     import RealProfiler._
     val current = Thread.currentThread()
@@ -245,6 +246,7 @@ class StreamProfileReporter(out:PrintWriter) extends ProfileReporter {
     reportCommon(EventType.BACKGROUND, profiler, threadRange)
   override def reportForeground(profiler: RealProfiler, threadRange: ProfileRange): Unit =
     reportCommon(EventType.MAIN, profiler, threadRange)
+  @nowarn("cat=deprecation")
   private def reportCommon(tpe:EventType, profiler: RealProfiler, threadRange: ProfileRange): Unit =
     out.println(s"$tpe,${threadRange.start.snapTimeNanos},${threadRange.end.snapTimeNanos},${profiler.id},${threadRange.phase.id},${threadRange.phase.phaseName.replace(',', ' ')},${threadRange.purpose},${threadRange.taskCount},${threadRange.thread.getId},${threadRange.thread.getName},${threadRange.runNs},${threadRange.idleNs},${threadRange.cpuNs},${threadRange.userNs},${threadRange.allocatedBytes},${threadRange.end.heapBytes} ")
 

library/src/scala/runtime/coverage/Invoker.scala

@@ -1,11 +1,11 @@
 package scala.runtime.coverage
 
-import scala.collection.mutable.{BitSet, AnyRefMap}
+import scala.annotation.internal.sharable
+import scala.annotation.nowarn
 import scala.collection.concurrent.TrieMap
+import scala.collection.mutable.{BitSet, AnyRefMap}
+import java.io.{File, FileWriter}
 import java.nio.file.Files
-import java.io.FileWriter
-import java.io.File
-import scala.annotation.internal.sharable
 
 @sharable // avoids false positive by -Ycheck-reentrant
 object Invoker {
@@ -48,6 +48,7 @@ object Invoker {
         writer.write('\n')
         writer.flush()
 
+  @nowarn("cat=deprecation")
   def measurementFile(dataDir: String): File = new File(
     dataDir,
     MeasurementsPrefix + runtimeUUID + "." + Thread.currentThread.nn.getId