Introduce "Convert property getter to initializer" intention

#KT-13854 Fixed

idea/testData/intentions/convertPropertyGetterToInitializer/.intention

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+org.jetbrains.kotlin.idea.intentions.ConvertPropertyGetterToInitializerIntention

idea/testData/intentions/convertPropertyGetterToInitializer/block.kt

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+val p: Int
+    get() {
+        return 1
+    }<caret>

idea/testData/intentions/convertPropertyGetterToInitializer/block.kt.after

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+val p: Int = 1

idea/testData/intentions/convertPropertyGetterToInitializer/extentionProperty.kt

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+// IS_APPLICABLE: false
+class C
+
+val C.p: Int
+    <caret>get() = 1

idea/testData/intentions/convertPropertyGetterToInitializer/hasComment.kt

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+val p: Int // comment
+    <caret>get() = 1

idea/testData/intentions/convertPropertyGetterToInitializer/hasComment.kt.after

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+val p: Int // comment
+        = 1

idea/testData/intentions/convertPropertyGetterToInitializer/hasComment2.kt

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+val p2: Int
+// comment
+    <caret>get() = 1

idea/testData/intentions/convertPropertyGetterToInitializer/hasComment2.kt.after

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+val p2: Int// comment
+        = 1

idea/testData/intentions/convertPropertyGetterToInitializer/hasComment3.kt

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+val p3: Int
+    <caret>get() = 1 // comment

idea/testData/intentions/convertPropertyGetterToInitializer/hasComment3.kt.after

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+val p3: Int = 1 // comment

idea/testData/intentions/convertPropertyGetterToInitializer/hasInitializer.kt

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+// IS_APPLICABLE: false
+var hasInitializer: Int = 0
+    <caret>get() = 1

idea/testData/intentions/convertPropertyGetterToInitializer/inInterface.kt

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+// IS_APPLICABLE: false
+interface I {
+    val p: Int
+        <caret>get() = 1
+}

idea/testData/intentions/convertPropertyGetterToInitializer/multiStatementBlock.kt

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+// IS_APPLICABLE: false
+val multiStatementBlock: Int
+    <caret>get() {
+        val a = 1
+        return 6
+    }

idea/testData/intentions/convertPropertyGetterToInitializer/run.kt

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+// WITH_RUNTIME
+val p: Int
+    <caret>get() = run { 1 }

idea/testData/intentions/convertPropertyGetterToInitializer/run.kt.after

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+// WITH_RUNTIME
+val p: Int = run { 1 }

idea/testData/intentions/convertPropertyGetterToInitializer/simple.kt

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+val p: Int
+    <caret>get() = 1

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

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+val p: Int = 1<caret>