test(transformer): add test for arrow function transform

tasks/transform_conformance/snapshots/oxc.snap.md

@@ -1,6 +1,6 @@
 commit: 3bcfee23
 
-Passed: 48/57
+Passed: 49/58
 
 # All Passed:
 * babel-plugin-transform-nullish-coalescing-operator

tasks/transform_conformance/tests/babel-plugin-transform-arrow-functions/test/fixtures/use-this-inside-blocks-in-arrow/input.js

@@ -0,0 +1,15 @@
+function outer() {
+  let f = () => {
+    {
+      let t = this;
+    }
+  };
+
+  let f2 = () => {
+    if (x) {
+      if (y) {
+        return this;
+      }
+    }
+  };
+}

tasks/transform_conformance/tests/babel-plugin-transform-arrow-functions/test/fixtures/use-this-inside-blocks-in-arrow/output.js

@@ -0,0 +1,17 @@
+function outer() {
+  var _this = this;
+
+  let f = function() {
+    {
+      let t = _this;
+    }
+  };
+
+  let f2 = function() {
+    if (x) {
+      if (y) {
+        return _this;
+      }
+    }
+  };
+}