KT-32368 Rework Inline hints settings // migrate tests for suspending calls

KotlinSuspendingCallHintsProvider which in now responsible for
suspending call hints is not compatible with the existing
SuspendingCallHintsTest. Because of that tests were migrated to the new
infrastructure.

idea/testData/codeInsight/hints/suspending/SimpleCase.kt

@@ -0,0 +1,5 @@
+import kotlin.coroutines.experimental.buildSequence
+
+val x = buildSequence {
+    <# # #>yield(1)
+}