Migrate for moved and renamed buildSequence/buildIterator (KT-26679)

#KT-26679 Fixed

idea/testData/quickfix/obsoleteCoroutines/buildSequence.kt

@@ -1,8 +1,10 @@
 // "Fix experimental coroutines usage" "true"
-// ERROR: Unresolved reference: buildSequence
-import kotlin.coroutines.<caret>experimental.buildSequence
+// WITH_RUNTIME
+package some
+
+import kotlin.coroutines.experimental.buildSequence
 
 fun main(args: Array<String>) {
-    val lazySeq = buildSequence<Int> {
+    val lazySeq = <caret>buildSequence<Int> {
     }
 }

idea/testData/quickfix/obsoleteCoroutines/buildSequence.kt.after

@@ -1,7 +1,10 @@
 // "Fix experimental coroutines usage" "true"
-// ERROR: Unresolved reference: buildSequence
+// WITH_RUNTIME
+package some
+
+import kotlin.coroutines.experimental.buildSequence
 
 fun main(args: Array<String>) {
-    val lazySeq = buildSequence<Int> {
+    val lazySeq = sequence<Int> {
     }
 }

idea/testData/quickfix/obsoleteCoroutines/buildSequenceImport.kt

@@ -0,0 +1,8 @@
+// "Fix experimental coroutines usage" "true"
+// ERROR: Unresolved reference: buildSequence
+import kotlin.coroutines.<caret>experimental.buildSequence
+
+fun main(args: Array<String>) {
+    val lazySeq = buildSequence<Int> {
+    }
+}

idea/testData/quickfix/obsoleteCoroutines/buildSequenceImport.kt.after

@@ -0,0 +1,7 @@
+// "Fix experimental coroutines usage" "true"
+// ERROR: Unresolved reference: buildSequence
+
+fun main(args: Array<String>) {
+    val lazySeq = buildSequence<Int> {
+    }
+}