Class static private field destructure set (#12917)

* fix: support static private field destructure set ([C.#p] = [0])

* 🚧

* fix: add compatibility warning for older @babel/helper versions

* refactor: extract common routines among classPrivateFiled helpers

* More 🚧

packages/babel-plugin-proposal-private-methods/test/fixtures/private-static-method/read-only/exec.js

@@ -0,0 +1,10 @@
+class A {
+  static #method() {}
+
+  run() {
+    expect(() => A.#method = 2).toThrow(TypeError);
+    expect(() => ([A.#method] = [2])).toThrow(TypeError);
+  }
+}
+
+

packages/babel-plugin-proposal-private-methods/test/fixtures/private-static-method/read-only/input.js

@@ -0,0 +1,8 @@
+class A {
+  static #method() {}
+
+  run() {
+    A.#method = 2;
+    ([A.#method] = [2]);
+  }
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/private-static-method/read-only/output.js

@@ -0,0 +1,9 @@
+class A {
+  run() {
+    babelHelpers.classStaticPrivateMethodSet(A, A, _method, 2);
+    [babelHelpers.classStaticPrivateFieldDestructureSet(A, A, _method).value] = [2];
+  }
+
+}
+
+var _method = function _method() {};