Support string templates in ConstantExpressionEvaluator

compiler/testData/resolveAnnotations/parameters/expressions/stringTemplate.kt

@@ -0,0 +1,19 @@
+package test
+
+annotation class Ann(
+        val s1: String,
+        val s2: String,
+        val s3: String,
+        val s4: String
+)
+
+val i = 1
+
+Ann(
+    s1 = "a$i",
+    s2 = "a$i b",
+    s3 = "$i",
+    s4 = "a${i}a$i"
+) class MyClass
+
+// EXPECTED: Ann[s1 = "a1": jet.String, s2 = "a1 b": jet.String, s3 = "1": jet.String, s4 = "a1a1": jet.String]