Analyze Data Flow: Support callable references

#KT-11994 In Progress

idea/testData/slicer/inflow/funResultViaCallableRef.kt

@@ -0,0 +1,10 @@
+// FLOW: IN
+
+fun foo(f: (Int) -> Int): Int {
+    return f(1)
+}
+
+fun test() {
+    fun bar(n: Int) = n
+    val <caret>x = foo(::bar)
+}

idea/testData/slicer/inflow/funResultViaCallableRef.results.txt

@@ -0,0 +1,10 @@
+9 val <bold>x = foo(::bar)</bold>
+9 	val x = <bold>foo(::bar)</bold>
+3 		fun <bold>foo(f: (Int) -> Int): Int {</bold>
+4 			return <bold>f(1)</bold>
+4 				[LAMBDA] return <bold>f</bold>(1)
+3 					[LAMBDA] fun foo(<bold>f: (Int) -> Int</bold>): Int {
+9 						[LAMBDA] val x = foo(<bold>::bar</bold>)
+8 							fun <bold>bar(n: Int) = n</bold>
+8 								fun bar(n: Int) = <bold>n</bold>
+8 									fun bar(<bold>n: Int</bold>) = n

idea/testData/slicer/inflow/funResultViaCallableRefWithAssignment.kt

@@ -0,0 +1,11 @@
+// FLOW: IN
+
+fun foo(f: (Int) -> Int): Int {
+    return f(1)
+}
+
+fun test() {
+    fun bar(n: Int) = n
+    val f = ::bar
+    val <caret>x = foo(f)
+}

idea/testData/slicer/inflow/funResultViaCallableRefWithAssignment.results.txt

@@ -0,0 +1,12 @@
+10 val <bold>x = foo(f)</bold>
+10 	val x = <bold>foo(f)</bold>
+3 		fun <bold>foo(f: (Int) -> Int): Int {</bold>
+4 			return <bold>f(1)</bold>
+4 				[LAMBDA] return <bold>f</bold>(1)
+3 					[LAMBDA] fun foo(<bold>f: (Int) -> Int</bold>): Int {
+10 						[LAMBDA] val x = foo(<bold>f</bold>)
+9 							[LAMBDA] val <bold>f = ::bar</bold>
+9 								[LAMBDA] val f = <bold>::bar</bold>
+8 									fun <bold>bar(n: Int) = n</bold>
+8 										fun bar(n: Int) = <bold>n</bold>
+8 											fun bar(<bold>n: Int</bold>) = n

idea/testData/slicer/inflow/funResultViaCallableRefWithDirectCall.kt

@@ -0,0 +1,6 @@
+// FLOW: IN
+
+fun test() {
+    fun bar(n: Int) = n
+    val <caret>x = (::bar)(1)
+}

idea/testData/slicer/inflow/funResultViaCallableRefWithDirectCall.results.txt

@@ -0,0 +1,6 @@
+5 val <bold>x = (::bar)(1)</bold>
+5 	val x = <bold>(::bar)(1)</bold>
+5 		[LAMBDA] val x = <bold>(::bar)</bold>(1)
+4 			fun <bold>bar(n: Int) = n</bold>
+4 				fun bar(n: Int) = <bold>n</bold>
+4 					fun bar(<bold>n: Int</bold>) = n