check descriptor before private field access (#12910)

* fix: check descriptor before private field access

* add test cases

packages/babel-plugin-proposal-class-properties/test/fixtures/private-loose/access-before-declaration/exec.js

@@ -0,0 +1,29 @@
+expect(() => {
+  class C {
+    static #_ = new C;
+    static #p;
+    constructor() {
+      C.#p;
+    }
+  }
+}).toThrow(/attempted to use private field on non-instance/);
+
+expect(() => {
+  class C {
+    static #_ = new C;
+    static #p;
+    constructor() {
+      C.#p = 0;
+    }
+  }
+}).toThrow(/attempted to use private field on non-instance/);
+
+expect(() => {
+  class C {
+    static #_ = new C;
+    static #p;
+    constructor() {
+      for (C.#p of [0]);
+    }
+  }
+}).toThrow(/attempted to use private field on non-instance/);

packages/babel-plugin-proposal-class-properties/test/fixtures/private/access-before-declaration/exec.js

@@ -0,0 +1,29 @@
+expect(() => {
+  class C {
+    static #_ = new C;
+    static #p;
+    constructor() {
+      C.#p;
+    }
+  }
+}).toThrow(/attempted to get private static field before its declaration/);
+
+expect(() => {
+  class C {
+    static #_ = new C;
+    static #p;
+    constructor() {
+      C.#p = 0;
+    }
+  }
+}).toThrow(/attempted to set private static field before its declaration/);
+
+expect(() => {
+  class C {
+    static #_ = new C;
+    static #p;
+    constructor() {
+      for (C.#p of [0]);
+    }
+  }
+}).toThrow(/attempted to set private static field before its declaration/);