ReplaceGuardClause inspection: do not remove 'else' branch

#KT-32797 Fixed

idea/testData/inspectionsLocal/replaceGuardClauseWithFunctionCall/require/hasElse.kt

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(flag: Boolean) {
+    <caret>if (!flag) throw IllegalArgumentException() else println(1)
+}

idea/testData/inspectionsLocal/replaceGuardClauseWithFunctionCall/require/hasElse.kt.after

@@ -0,0 +1,5 @@
+// WITH_RUNTIME
+fun test(flag: Boolean) {
+    <caret>require(flag)
+    println(1)
+}

idea/testData/inspectionsLocal/replaceGuardClauseWithFunctionCall/require/hasElse2.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+fun test(flag: Boolean) {
+    <caret>if (!flag) throw IllegalArgumentException()
+    else {
+        println(1)
+        println(2)
+    }
+}

idea/testData/inspectionsLocal/replaceGuardClauseWithFunctionCall/require/hasElse2.kt.after

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun test(flag: Boolean) {
+    <caret>require(flag)
+    println(1)
+    println(2)
+}

idea/testData/inspectionsLocal/replaceGuardClauseWithFunctionCall/require/hasElse3.kt

@@ -0,0 +1,11 @@
+// WITH_RUNTIME
+fun test(flag: Boolean, i: Int) {
+    <caret>if (!flag) {
+        throw IllegalArgumentException()
+    } else if (i == 0) {
+        println(0)
+    } else {
+        println(1)
+        println(2)
+    }
+}

idea/testData/inspectionsLocal/replaceGuardClauseWithFunctionCall/require/hasElse3.kt.after

@@ -0,0 +1,10 @@
+// WITH_RUNTIME
+fun test(flag: Boolean, i: Int) {
+    <caret>require(flag)
+    if (i == 0) {
+        println(0)
+    } else {
+        println(1)
+        println(2)
+    }
+}

idea/testData/inspectionsLocal/replaceGuardClauseWithFunctionCall/requireNotNull/hasElse.kt

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(foo: Int?) {
+    <caret>if (foo == null) throw IllegalArgumentException("test") else println(1)
+}

idea/testData/inspectionsLocal/replaceGuardClauseWithFunctionCall/requireNotNull/hasElse.kt.after

@@ -0,0 +1,5 @@
+// WITH_RUNTIME
+fun test(foo: Int?) {
+    <caret>requireNotNull(foo) { "test" }
+    println(1)
+}

idea/testData/inspectionsLocal/replaceGuardClauseWithFunctionCall/usedAsExpression.kt

@@ -0,0 +1,6 @@
+// PROBLEM: none
+// WITH_RUNTIME
+fun test(flag: Boolean): Int {
+    return <caret>if (!flag) throw IllegalArgumentException() else 1
+}
+