Add intention for converting to block comment and vise versa

So #KT-23137 Fixed

idea/testData/intentions/convertBlockCommentToLineComment/.intention

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.intentions.ConvertBlockCommentToLineCommentIntention

idea/testData/intentions/convertBlockCommentToLineComment/afterStatement.kt

@@ -0,0 +1,3 @@
+fun test() {
+    val foo = 1 /* comment */<caret>
+}

idea/testData/intentions/convertBlockCommentToLineComment/afterStatement.kt.after

@@ -0,0 +1,3 @@
+fun test() {
+    val foo = 1 // comment
+}

idea/testData/intentions/convertBlockCommentToLineComment/beforeStatement.kt

@@ -0,0 +1,3 @@
+fun test() {
+    /* comment */<caret> val foo = 1
+}

idea/testData/intentions/convertBlockCommentToLineComment/beforeStatement.kt.after

@@ -0,0 +1,4 @@
+fun test() {
+    // comment
+    val foo = 1
+}

idea/testData/intentions/convertBlockCommentToLineComment/blankLine.kt

@@ -0,0 +1,11 @@
+fun test() {
+    /*
+
+    comment1
+
+        comment2
+
+    comment3
+    */<caret>
+    val foo = 1
+}

idea/testData/intentions/convertBlockCommentToLineComment/blankLine.kt.after

@@ -0,0 +1,8 @@
+fun test() {
+    // comment1
+    //
+    // comment2
+    //
+    // comment3
+    val foo = 1
+}

idea/testData/intentions/convertBlockCommentToLineComment/docComment.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+fun test() {
+    /**
+     * comment
+     */<caret>
+    val foo = 1
+}

idea/testData/intentions/convertBlockCommentToLineComment/endOflineComment.kt

@@ -0,0 +1,5 @@
+// IS_APPLICABLE: false
+fun test() {
+    // comment<caret>
+    val foo = 1
+}

idea/testData/intentions/convertBlockCommentToLineComment/newLinesBetweenCommentAndDeclaration.kt

@@ -0,0 +1,9 @@
+fun foo() {}
+
+
+/*
+   comment
+*/<caret>
+
+
+fun bar() {}

idea/testData/intentions/convertBlockCommentToLineComment/newLinesBetweenCommentAndDeclaration.kt.after

@@ -0,0 +1,7 @@
+fun foo() {}
+
+
+// comment
+
+
+fun bar() {}

idea/testData/intentions/convertBlockCommentToLineComment/simple.kt

@@ -0,0 +1,7 @@
+fun test() {
+    /*
+    comment1
+    comment2
+    */<caret>
+    val foo = 1
+}

idea/testData/intentions/convertBlockCommentToLineComment/simple.kt.after

@@ -0,0 +1,5 @@
+fun test() {
+    // comment1
+    // comment2
+    val foo = 1
+}