[AA] handles FIR isUsedAsExpression for return within function block

For the following example:

```
fun foo(bar: Int) {
  <expr>if (bar == 4) return "Four"
  else return "Int"</expr>
}
```

AA FE1.0 `isUsedAsExpression` returns `false`.
Since the current AA FIR `isUsedAsExpression` returns `true` for the
above example, this commit fixes it.

analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/function_body_with_if.kt

@@ -0,0 +1,5 @@
+fun test(n: Int) =
+    <expr>if (n == 1)
+        "one"
+    else
+        "two"</expr>

analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/function_body_with_if.txt

@@ -0,0 +1,6 @@
+expression: IF
+text: if (n == 1)
+        "one"
+    else
+        "two"
+isUsedAsExpression: true

analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/function_equal_block_with_if.kt

@@ -0,0 +1,6 @@
+fun test(n: Int) = {
+    <expr>if (n == 1)
+        "one"
+    else
+        "two"</expr>
+}

analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/function_equal_block_with_if.txt

@@ -0,0 +1,6 @@
+expression: IF
+text: if (n == 1)
+        "one"
+    else
+        "two"
+isUsedAsExpression: true

analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/return_inside_if.kt

@@ -0,0 +1,6 @@
+fun test(n: Int): String {
+    if (n == 1)
+        <expr>return "one"</expr>
+    else
+        return "two"
+}

analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/return_inside_if.txt

@@ -0,0 +1,3 @@
+expression: RETURN
+text: return "one"
+isUsedAsExpression: false

analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/return_with_if.kt

@@ -0,0 +1,6 @@
+fun test(n: Int): String {
+    <expr>if (n == 1)
+        return "one"
+    else
+        return "two"</expr>
+}

analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/return_with_if.txt

@@ -0,0 +1,6 @@
+expression: IF
+text: if (n == 1)
+        return "one"
+    else
+        return "two"
+isUsedAsExpression: false