FIR resolution API: fix handling of expressions inside imports

idea/testData/fir/lazyResolve/import/bar/bar.kt

@@ -0,0 +1,3 @@
+package bar
+
+fun barbar(): Int = 13

idea/testData/fir/lazyResolve/import/bar/bar.txt

@@ -0,0 +1,4 @@
+FILE: bar.kt
+    public final fun barbar(): R|kotlin/Int| {
+        ^barbar Int(13)
+    }

idea/testData/fir/lazyResolve/import/foo/main.kt

@@ -0,0 +1,7 @@
+package foo
+
+import bar.<caret>barbar
+
+fun foofoo(): Int {
+    return barbar()
+}

idea/testData/fir/lazyResolve/import/foo/main.txt

@@ -0,0 +1,4 @@
+FILE: main.kt
+    public final fun foofoo(): R|kotlin/Int| {
+        ^foofoo R|bar/barbar|()
+    }

idea/testData/fir/lazyResolve/import/import.test

@@ -0,0 +1,3 @@
+{
+  "mainFile": "foo/main.kt"
+}

idea/testData/fir/lazyResolve/import/results.txt

@@ -0,0 +1 @@
+import bar.barbar