Implement Unwrap/Remove for try expressions

idea/testData/codeInsight/unwrapAndRemove/unwrapCatch/catchCompoundInBlock.kt

@@ -0,0 +1,18 @@
+// OPTION: 0
+fun foo(n: Int): Int {
+    try {
+        n / 0
+    }
+    <caret>catch (e: ArithmeticException) {
+        val m = -1
+        m
+    }
+    catch (e: Exception) {
+        -2
+    }
+    finally {
+
+    }
+
+    return 0
+}

idea/testData/codeInsight/unwrapAndRemove/unwrapCatch/catchCompoundInBlock.kt.after

@@ -0,0 +1,7 @@
+// OPTION: 0
+fun foo(n: Int): Int {
+    val m = -1
+    m<caret>
+
+    return 0
+}

idea/testData/codeInsight/unwrapAndRemove/unwrapCatch/catchCompoundInReturn.kt

@@ -0,0 +1,16 @@
+// IS_APPLICABLE: false
+fun foo(n: Int): Int {
+    return try {
+        n / 0
+    }
+    <caret>catch (e: ArithmeticException) {
+        val m = -1
+        m
+    }
+    catch (e: Exception) {
+        -2
+    }
+    finally {
+
+    }
+}

idea/testData/codeInsight/unwrapAndRemove/unwrapCatch/catchSimpleInReturn.kt

@@ -0,0 +1,15 @@
+// OPTION: 0
+fun foo(n: Int): Int {
+    return try {
+        n / 0
+    }
+    <caret>catch (e: ArithmeticException) {
+        -1
+    }
+    catch (e: Exception) {
+        -2
+    }
+    finally {
+
+    }
+}

idea/testData/codeInsight/unwrapAndRemove/unwrapCatch/catchSimpleInReturn.kt.after

@@ -0,0 +1,4 @@
+// OPTION: 0
+fun foo(n: Int): Int {
+    return -1<caret>
+}