Take into account synthetic declarations when sanitizing a stacktrace

[qwwdfsad]

The following test

@Test
fun foo() = runBlocking {
    DebugProbes.dumpCoroutines()
}

will print these lines:

(Coroutine creation stacktrace)
	at kotlin.coroutines.intrinsics.IntrinsicsKt__IntrinsicsJvmKt.createCoroutineUnintercepted(IntrinsicsJvm.kt:116)
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:26)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at definitely.not.kotlinx.coroutines.SanitizedProbesTest.foo(SanitizedProbesTest.kt:25)

Probably it is worth to make sanitizing heuristic aware of such methods and provide at least one frame with actual source, e.g.

(Coroutine creation stacktrace)
	at kotlin.coroutines.intrinsics.IntrinsicsKt__IntrinsicsJvmKt.createCoroutineUnintercepted(IntrinsicsJvm.kt:116)
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:26)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:36)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at definitely.not.kotlinx.coroutines.SanitizedProbesTest.foo(SanitizedProbesTest.kt:25)